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Students can Download Chapter 7 Correlation Questions and Answers, Plus One Economics Chapter Wise Questions and Answers helps you to revise the complete Kerala State Syllabus and score more marks in your examinations

Kerala Plus One Economics Chapter Wise Questions and Answers Chapter 7 Correlation

Plus One Economics Correlation One Mark Questions and Answers

Question 1.
Who developed rank correlation co-efficient.
(i) Karl Pearson
(ii) Karl Marx
(iii) Spearman
(iv) None of the above
Answer:
(iii) Spearman

Question 2.
If r= +1, if shows:
(i) Positive correlation
(ii) Perfect positive correlation
(iii) No correlation
(iv) Rank correlation
Answer:
(ii) Perfect positive correlation

Question 3.
If ‘r’ is positive the two variables will more in
(i) Opposite direction
(ii) Inverse direction
(iii) Same direction
(iv) None of the above
Answer:
(iii) Same direction

Question 4.
Which of the following correlation can be used to measure numerically only leniar relationship between two variables?
(i) Karl Pearsons coefficient of correlation
(ii) Spearman correlation
(iii) Rank correlation
(iv) None of the above
Answer:
(i) Karl Pearsons coefficient of correlation

Question 5.
The unit of correlation coefficient between height in feet and weight in kgs is
(i) kg/feet
(ii) percentage
(iii) non-existent
Answer:
(iii) non-existent

Question 6.
The range of simple correlation coefficient is
(i) 0 to infinity
(ii) minus one to plus one
(iii) minus infinity to infinity
Answer:
(ii) minus one to plus one

Question 7.
If r_xy is positive the relation between X and Y is of the type.
(i) When Y increases X increases
(ii) When Y decreases X increases
(iii) When Y increases X does not change
Answer:
(i) When Y increases X increases

Question 8.
If r_xy = 0 the variable X and Y are
(i) linearly related
(ii) not linearly related
(iii) independent
Answer:
(ii) not linearly related

Question 9.
Of the following three measures which can measure any type of relationship
(i) Karl Pearson’s coefficient of correlation
(ii) Spearman’s rank correlation
(iii) Scatter diagram
Answer:
(iii) Scatter diagram

Question 10.
If precisely measured data are available the simple correlation coefficient is
(i) more accurate than rank correlation coefficient
(ii) less accurate than rank correlation coefficient
(iii) as accurate as the rank correlation coefficient
Answer:
(iii) as accurate as the rank correlation coefficient

Question 11.
Define correlation.
Answer:
Correlation studies and measures the direction and intensity of relationship among variables.

Question 12.
Write the formula for calculating correlation.
Answer:
1. Karl Pearson’s coefficient of correlation
\(r=\frac{\sum x y}{\sqrt{\sum x^{2} \times \sum y^{2}}}\)

2. Spearman’s Rank correlation coefficient
\(R=1-\frac{6 \Sigma D^{2}}{N\left(N^{2}-1\right)}\)

Plus One Economics Correlation Two Mark Questions and Answers

Question 1.
Can r lie outside the -1 and 1 range depending on the type of data?
Answer:
No, r cannot lie outside -1 and 1 range depending on the types of data. It lies between minus one and plus one.

Question 2.
Indicate the kind of relationship between X and Y, if the points of the scatter diagram tend to cluster about.

1. A straight line sloping upward.
2. A straight line sloping downward.

Answer:

1. A straight line sloping upward: it is the case of positive correlation.
2. A straight line sloping downward: it is the case of negative correlation.

Question 3.
Name the correlation mentioned in the graph.

Answer:
(a) Positive correlation
(b) Negative correlation
(c) No correlation
(d) Perfect positive correlation
(e) Perfect negative correlation

Question 4.
Give two examples each for positive and negative correlation.
Answer:
1. Positive Correlation

• Relation between price and supply
• Relation between height and weight

2. Negative Correlation

• Relation between price and demand
• Sale of woolen garment and day temperature

Question 5.
What are perfect correlations? Give examples.
Answer:
Perfect correlation is that where changes in two related variables are exactly proportional. It is of two types:
a) Positive perfect correlation and
b) Negative perfect correlation
There is perfect positive correlation between the two variables of equal proportional changes are in the same direction. It is expressed as +1. If equal proportional changes are in the reverse direction. Then there is negative perfect correlation and it is described as -1.

Question 6.
Show in scatter diagram the following.

1. Positive correlation
2. Negative correlation

Answer:

Plus One Economics Correlation Three Mark Questions and Answers

Question 1.
Interpret the values for as 1, -1 and 0.
r=1 r = -1 r = 0
Answer:
r as 1 means that there is perfect positive relationship between two variables r as -1 means that there is perfect negative relationship between two variables r as 0 means that there lack correlation between two variables

Question 2.
List some variables where accurate measurement is difficult.
Answer:
The following are some variables where accurate measurement is difficult.

• Secularism
• Honesty
• Beauty
• Impartiality
• Patriotism

Question 3.
State the nature of relationship.

1. sale of woolen garments and the day temperature
2. amount of rainfall and yield of crop
3. the colour of dress and intelligence of the lady

Answer:

1. negative correlation
2. positive correlation
3. no correlation

Question 4.
Write down the merits of scatter diagram.
Answer:
Merits of scatter diagram are pointed out below:

1. It is a very simple method of studying correlation.
2. Just a glance of the diagram will show the relationship.
3. It indicates whether the relationship is positive or negative.

Question 5.
Construct a flow chart showing the methods of measuring correlation?
Answer:

Question 6.
Illustrate positive correlation and negative correlation.
Answer:
Correlation is commonly classified into negative and positive correlation.
The correlation is said to be positive when the variables move together in the same direction. When the income rises, consumption also rises. When income falls, consumption also falls. For instance, sale of ice-cream and temperature move in the same direction.

The correlation is negative when they move in opposite directions. When the price of apples falls its demand increases. When the prices rise its demand decreases. When you spend more time in studying, chances of your failing decline. These are instances of negative correlation. The variables move in opposite direction.

Question 7.
Calculate the coefficient of correlation from the following data.

Answer:

Question 8.
The following are the ranks obtained by 10 students in two subjects. Calculate Spearman’s rank correlation.

Rank of Statistics	Rank of Economics
1	2
2	4
3	1
4	5
5	3
6	9
7	7
8	10
9	6
10	8

Answer:

Question 9.
Calculate coefficient of correlation using the following data.

Answer:

Plus One Economics Correlation Five Mark Questions and Answers

Question 1.
What do you mean by Spearman’s rank correlation coefficient? Point out the situations where it is used. Also, bring about its usefulness.
Answer:
Spearman’s rank correlation was developed by the British psychologist C.E. Spearman. It is used when the variables cannot be measured meaningfully as in the case of price, income, weight, etc. The ranking may be more meaningful when the measurements of the variables are suspect.

There are also situations when you are required to quantify qualities such as fairness, honesty, etc. Ranking may be a better alternative to the quantification of qualities. Moreover, sometimes the correlation coefficient between two variables with extreme values may be quite different from the coefficient without the extreme values. Under these circumstances, rank correlation provides a better alternative to simple correlation.

Rank correlation coefficient and simple correlation coefficient have the same interpretation. Its formula has been derived from simple correlation coefficient where individual values have been replaced by ranks. These ranks are used for the calculation of correlation. This coefficient provides a measure of linear association between ranks assigned to these units, not their values. It is the Product Moment Correlation between the ranks.

Question 2.
“Correlation Coefficient has certain essential properties”-substantiate.
Answer:
Correlation Coefficient has certain essential properties as discussed below.
1. r has no unit. It is a pure number. It means units of measurement are not part of r. r between height in feet and weight in kilograms, for instance, is 0.7.

2. A negative value of /-indicates an inverse relation. A change in one variable is associated with change in the other variable in the opposite direction. When price of a commodity rises, its demand falls. When the rate of interest rises the demand for funds also falls. It is because now funds have become costlier.

3. If r is positive the two variables move in the same direction. If/”= 0 the two variables are uncorrelated. There is no linear relation between them. However other types of relationships may be there.

4. If r = 1 or r = -1 the correlation is perfect. The relation between them is exact.

5. A high value of r indicates strong linear relationship. Its value is said to be high when it is close to+1 or-1.

6. A low value of r indicates a weak linear relation. Its value is said to be low when it is dose to zero.

7. The value of the correlation coefficient lies between minus one and plus one, -1 < r < +1. If, in any exercise, the value of r \s outside this range indicates error in calculation.

8. The value of r is unaffected by the change of origin and change of scale. Given two variables X and Y let us define two new variables.

Question 3.
Illustrate the following ideas in scatter diagrams.
i. Positive correlation
ii. Perfect positive correlation
iii. Negative correlation
iv. Perfect negative correlation No correlation
Answer:

Students can Download Chapter 7 Control Statements Questions and Answers, Plus One Computer Science Chapter Wise Questions and Answers helps you to revise the complete Kerala State Syllabus and score more marks in your examinations.

Kerala Plus One Computer Science Chapter Wise Questions and Answers Chapter 7 Control Statements

Plus One Control Statements One Mark Questions and Answers

Question 1.
An if statement contains another if statement completely. Then it is known as _________.
Answer:
Nested if

Question 2.
From the following which is not optional with switch statement.
(a) break
(b) default
(c) case
(d) none of these
Answer:
(c) case.

Question 3.
To exit from a switch statement _______ is used.
(a) quit
(b) exit
(c) break
(d) none of these
Answer:
(c) break

Question 4.
From the following which statement is true for switch statement.
(a) switch is used to test the equality
(b) switch is used to test relational or logical expression
(c) switch can handle real numbers case data
(d) none of these
Answer:
(a) switch is used to test the equality

Question 5.
Sonet wants to execute a statement more than once. From the following which is exactly suitable.
(a) if
(b) loop
(c) switch
(d) if else if ladder
Answer:
(b) loop

Question 6.
Odd one out
(a) for
(b) if
(c) switch
(d) if-else if ladder
Answer:
(a) for. It is a loop the others are branching statement.

Question 7.
Odd one out
(a) for
(b) if
(c) while
(d) do-while
Answer:
(b) if. It is a branching statement and the others are loops.

Question 8.
From the following which loop does the three things, initialisation, checking and updation.
(a) while
(b) do-while
(c) for
(d) none of these
Answer:
(c) for

Question 9.
Predict the output Output
(a) 10
(b) 1 to 10
(c) 11
(d) none of these
Answer:
(c) 11.

Question 10.
From the following which is exit controlled loop
(a) for
(b) while
(c) do-while
(d) None of these
Answer:
(c) do-while

Question 11.
_____________ statement is used for unconditional jump from one location to another.
Answer:
goto.

Question 12.
Sunitha wants to skip one iteration. From the following which will help her?
(a)continue
(b) break
(c) for
(d) case
Answer:
(a) continue

Question 13.
To terminate a program, from the following which is used.
(a) break
(b) continue
(c) end()
(d) exit()
Answer:
(d) exit()

Question 14.
Which header file is needed to use exit() function in a program?
(a) iostream
(b) cstdlib
(c) math
(d) iomanip
Answer:
(b) cstdlib

Question 15.
In while loop, the loop variable should be updated?
(a) along with while statement
(b) after the while statement
(c) before the while statement
(d) inside the body of while
Answer:
(d) Inside the body of while

Question 16.
How many times the following loop will execute?
int S = 0, i = 0;
do
{
S + = i;
i++;
} while(i < 5);
Answer:
5 times

Question 17.
1. statement takes the program control out of the loop even though the test expression is true.

2. Consider the following code fragment. How many times will the character be printed on the screen?
for (i=0; i< 10; i =i+2);
cout <<“*”;
}
Answer:

1. break or goto
2. Only one time because of semicolon(;) in the end of the for(i=0;i<10;i=i+2);

Question 18.
Which selection statement tests the value of a variable or an expression against a list of integers or character constants? (SAY-2015) (1)
(a) For
(b) If
(c) Switch
(d) Conditional expression
Answer:
(c) switch

Question 19.
How many times the following loop will execute? (MARCH-2016) (1)
int m = 2
do
{
cout<<“Welcome”; m++ ;
} while (m>10);
Answer:
Only one time

Question 20.
________ statement takes the program control outside a loop even though the test expression is true. (SCERT SAMPLE – II) (1)
Answer:
break

Question 21.
Read the following C++ statement for (int n = 1; n<10; n+=2); cout<<n
Now, choose the correct output from the following options. (SCERT SAMPLE – II)(1)
(a) 1
(b) 13579
(c) 11
(d) 10
Answer:
(c) 11. This is because of for statement is end with; (semi colon). Here cout<<n; executes only once.

Question 22.
____________ search method is an example for ‘divide and conquer method’.
Answer:
goto.

Question 23.
1. Name the type or loop which can be used to ensure that the body of the loop will surely be executed at least once.

2. Consider the code given below and predict the output. (MARCH-2017) (1)
for (int i=1; i<=9;i=i+2)
{
if (i==5) continue;
cout<<i<< ” “;
}
Answer:

1. do while loop(Exit controlled loop)
2. 1 3 7 9. It bypasses one iteration of the loop when i = 5.

Plus One Control Statements Two Mark Questions and Answers

Question 1.
Your friend Arun asked you that is there any loop that will do three things, initialization, testing and updation. What is your answer. Explain?
Answer:
Yes. There is only one loop namely for loop that will do this three things. The other loops will do the checking only, initialisation must be do before the loop and updation must be inside the loop.
The syntax of for loop is given below For(initialisation; testing; updation)
{
Body of the for loop;
}

Question 2.
While writing a program Geo uses while loop but forgets to update the loop variable. What will happen?
Answer:
The loop variable inside the while loop must be updated otherwise the loop will not be terminated. The loop will be work infinitely.

Question 3.
Draw the flow chart of if statement.
Answer:

Question 4.
Draw the flow chart of if else statement
Answer:

Question 5.
Write a while loop that display numbers from 500 to 550.
Answer:
int i = 500
while (i<=550)
{
cout<<i;
i = i + 1;
}

Question 6.
Distinguish between exit(0) function and return statement
Answer:
Both are used to terminate the program but both are different. Return is a keyword and exit(0) is a function. The difference is, we can use more than one exit(0) function but we can use only one return statement in a scope. To use exit(0), the header file cstdlib should be used.

Question 7.
Draw the flowchart of for loop
Answer:

Question 8.
How many time the following for loop will execute? Justify.
for(i = 0; ; i ++)
{
if(i > 5)
cout<<“continue”;
else
cout<<“over”;
}
Answer:
Here the loop becomes infinite because the check condition is missing.

Question 9.
Predict the output.
#include<iostream.h>
int main()
{
int a = 0;
start:
cout<<endl<< ++a;
if(a < 5)
goto start;
}
Answer:
1
2
3
4
3

Question 10.
for(int i=2, sum=0; i <= 20; i=i+2)
sum += i;
Rewrite the above code using while loop.
Answer:
int i = 2; sum=0;
while (i<=20)
{
sum += i;
i = i + 2;
}

Question 11,.
Rewrite the following code using switch case statement.
if(day == 1)
cout<<“Sunday”;
else if(day == 2)
cout<<“Monday”;
else if(day == 7)
cout<<“Saturday”;
else
cout <<“Wednesday”;
Answer:
switch (day)
{
case 1: cout<<“Sunday”;break;
case 2: cout<<“Monday”;break;
case 7: cout<<“Saturday”;break;
default : cout<<“Wednesday”;
}

Question 12.
Pick the odd one out from the following. Give reason.

1. for, while, do….while
2. if, switch, for

Answer:

1. do…..while. It is an exit controlled loop while others are entry controlled loop
2. for. It is a loop while others are branching statements.

Question 13.
State whether the following statements are True or False. In either case justify your answer.

1. Break statement is essential in switch
2. For loop is an entry controlled loop
3. Do…while loop is an entry controlled loop
4. Switch is a selection statement

Answer:

1. False. It is not essential in single case statement
2. True. Because it will first check the condition. If it is true then only the body will be executed.
3. False. It is an exit controlled loop.
4. True.

Question 14.
Write the equivalent code for the following statement. R = (P<Q?P:Q)
Answer:
if(P<Q)
R = P;
else
R = Q;

Question 15.
Examine the following code snippet and find out the output? What will happen if the statement int ch; is replaced by char ch;
int ch;
for(ch=’A’;ch<=’Z’;++ch)
cout<<ch<<”;
Answer:
This code snippet will print 65, 66, 67,……., 90. If the statement int ch; is replaced by char ch; it prints A, B, C, ……., Z.

Question 16.

1. _______ is an entry control loop.
2. _______ Explain the memory allocation for the following declaration statement. int A[10] [10];

Answer:

1. while or for loop
2. To store an integer 4 bytes is used in Geany Editor. int A[10] [10]; → It needs 10 × 10 × 4 = 400 bytes

Question 17.
Differentiate between break and continue statements in C++. (SAY -2016) (2)
Answer:
break statement:
It is used to skip over a part of the code i.e. we can premature exit from a loop such as while, do-while, for or switch.
Syntax:
while (expression)
{
if (condition)
break;
}

continue statement:
It bypasses one iteration of the loop. That is it skips one iteration and continue the loop with next iteration value.
Syntax :
while (expression)
{
if (condition)
continue;
}

Plus One Control Statements Three Mark Questions and Answers

Question 1.
Compare if else and conditional operator?
Answer:
We can use conditional operator as an alternative of if-else statement. The conditional operator is a ternary operator.
The syntax of if-else
if (expression 1)
expression 2;
else
expression 3;

First expression 1 is evaluated if it is true expression 2 will be executed otherwise expression 3 will be executed. Instead of this, we can be written as follows using conditional operator Expression 1 ? expression 2: expression 3;

Question 2.

Answer:

Question 3.
Rewrite the program following program using if else.
#include<iostream>
using namespace std;
int main()
{
int a,b,big;
cout<<“Enter two integers”;
cin>>a>>b;
big = (a>b)?a:b;
cout<<“Biggest number is “<<big<<endl;
return 0;
}
Answer:

Question 4.


Is it possible to rewrite the above program using switch statement? Distinguish between switch and if else if ladder.
Answer:
No. It is not possible to write the above code using switch statement. Following are the difference between switch and if else if ladder.

1. Switch can test only for equality but if can evaluate a relational or logical expression
2. If else is more versatile
3. If else can handle floating values but switch cannot
4. If the test expression contains more variable if-else is used
5. Testing a value against a set of constants switch is more efficient than if-else.

Question 5.
Rewrite the following using nested switch construct.

Answer:

Question 6.
Consider the following output and write down the code for the same.
*
* *
* * *
* * * *
Answer:
#include<iostream>
using namespace std;
int main()
{
int i,j;
for(i=1;i<5;i++)
{
for(j=1;j<=i;j++)
cout<<n*”;
cout<<endl;
}
}

Question 7.
Consider the following output and write down the code for the same.
1
1 2
1 2 3
1 2 3 4
Answer:
#include<iostream>
using namespace std;
int main()
{
int ij;
for(i=1;i<5;i++)
{
for(j=l;j<=i;j++)
cout<<j<<“”;
cout<<endl;
}
}

Question 8.
Consider the following output and write down the code for the same.
1
2 2
3 3 3
4 4 4 4
Answer:
#include<iostream>
using namespace std;
int main()
{
int ij;
for(i=1;i<5;i++)
{
for(j=1;j<=i;j++)
cout<<i<<””;
cout<<endl;
}
}

Question 9.
Consider the following output and write down the code for the same.
1
2 3
4 5 6
7 8 9 10
Answer:
#include<iostream>
using namespace std;
int main()
{
int ij,k=0;
for(i=1;i<5;i++)
{
for(j=l;j<=i;j++)
cout<<++k<<“”;
cout<<endl;
}
}

Question 10.
Consider the following output and write down the code for the same.
1
1 3
1 3 5
1 3 5 7
Answer:
#include<iostream>
using namespace std;
int main()
{
int i,j;
for(i=1;i<5;i++)
{
for(j=1;j<=i;j++)
cout<<j × 2-1<<”
cout<<endl;
}
}

Question 11.
Consider the following output and write down the code for the same.
2
4 4
6 6 6
8 8 8 8
Answer:
#include<iostream>
using namespace std;
int main()
{
int i,j;
for(i=1;i<5;i++)
{
for(j=1;j<=i;j++)
cout<<i × 2<<“”;
cout<<endl;
}
}

Question 12.
Write a program to print the sum of first n natural numbers.
Answer:
#include<iostream>
using namespace std;
int main()
{
int n,i,sum=0;
cout<<“Enter a value for n”;
cin>>n;
for(i=1;i<=n;i++)
{
sum = sum + i;
}
cout<<“The sum of first ” <<n<<” numbers is “<<sum;
}

Question 13.
Write a program to read a number and check whether it is palindrome or not.
Answer:

Question 14.
Write a program to print the factorial of a number.
Answer:
#include<iostream>
using namespace std;
int main()
{
int n,i;
long fact = 1;
cout<<“Enter a number”;
cin>>n;
for(i=1;i<=n;i++)
fact = fact × i;
cout<<“The factorial of “<<n<<” is “<<fact;
}

Question 15.
Write a program to print the Fibonacci series.
Answer:
#include<iostream>
using namespace std;
int main()

Question 16.
Write a program to read a number and check whether the given number is Armstrong or not.
Answer:

Question 17.
Write down the code for the following output using while loop.
*
* *
* * *
* * * *
Answer:

Question 18.
Distinguish between entry controlled loop and exit controlled loop.
Answer:
An entry controlled loop first checks the condition and execute(or enters in to) the body of loop only if it is true. But exit control loop first execute the body of the loop once even if the condition is false then check the condition. The for loop and while loop are entry controlled loops but do-while loop is an exit controlled loop.

Question 19.
Write a program to find the largest of 3 numbers.
Answer:

Question 20.
Check whether a given number is prime or not.
Answer:

Question 21.
Write a program to print the prime numbers less than 100.
Answer:

Question 22.
Write a program to read number and display its factors.
Answer:
#include<iostream>
using namespace std;
int main()
{
int n,i;
cout<<“Enter a number greater than zero”;
cin>>n;
cout<<“The factors are”;
for(i=1;i<=n;i++)
if(n%i==0)
cout<<i<<“,”;
}

Question 23.
Write a program to print the Armstrong numbers less than 1000.
Answer:

Question 24.
Char result;
float marks;
cin>>marks;
if (marks >= 50)
result = ’P’;
else
result = ’F’;
cout<<result;
Rewrite the above code without using if statement.
Answer:
result=(marks>=50) ? ’P’: ’F’;

Question 25.
The output of a program is given below.
1
3
5
7
9
The sum is 25
Write a C++ program for obtaining the above output.
Answer:
#include<iostream>
using namespace std;
int main()
{
int sum=0,i;
for (i=1; i<=9; i+=2)
{
cout<<i<<endl;
sum = sum + i;
}
cout<<“The sum is”<<sum;
}

Question 26.
Find out the error in syntax if any and correct it?
Answer:
1. while (test condition);
{
}

2. do (condition)
{
}while

3. switch (condition)
{
Case 1:
Case 2:
Case 3:
Case 4:
}
Answer:
1. No need of semi colon. The corrected toop is given below
while (test condition)
{
}

2. In do … while loop the while must be end with semicolon.
do (condition)
{
}while;

3. switch contains expression instead of condition switch(expression)
{
Case 1:
Case 2:
Case 3:
Case 4:
}

Question 27.
Given the total mark of each student in SSLC examination. Write a C++ code fragment to find the grades.
Answer:

Question 28.
You are given the heights of 3 students. Write the relevant code segment to find the maximum height?
Answer:

Question 29.
Write the easiest code snippet for printing your name 1000 times. Explain.
Answer:
#include<iostream>
using namespace std;
int main()
{
int i;
char name[20];
cout<<“Enter your name:
cin>>name;
for(i=0;i<1000;i++)
cout<<name<<endl;
}

Question 30.
Given a code segment for(i=1; i<10; i++)
cout<<i;

1. Rewrite the code using do….while loop
2. What will be the output when i = 0? Give reason.

Answer:
1. i = 1;
do{
cout<<i; i++;
}while(i<10);

2. When i = 0, it will execute one more time. ie. the for loop execute 9 times but here this loop executes 10 times.

Question 31.
Whenever a string is entered the inverse of that string is displayed( eg: if we enter ‘CAR’ the output is ‘RAC’). Write a suitable programme for the output.
Answer:

Question 32.
Write a C++ program to display as follows
A
A B
A B C
A B C D
A B C D E
Answer:

Question 33.
Write C++ program forgetting the following output. (SAY-2016) (3)
1
1 2
1 2 3
1 2 3 4

OR

Consider the following C++ program and answer the following questions.
#include<iostream.h>
int main()
{
int a, p = 1;
for(a=1;a<=5;a+=2)
p = p × a;
cout<<p;
}

(a) Predict the output of the above code.
(b) Rewrite the above program using while loop.

Answer:

Plus One Control Statements Five Mark Questions and Answers

Question 1.
“We know that the execution of a program is sequential”. Is it possible to change this sequential manner and explain different jump statements in detail.
Answer:
The execution of a program is sequential but we can change this sequential manner by using jump statements. The jump statements are
1. goto statement:
By using goto we can transfer the control anywhere in the program without any condition. The syntax is goto label;
Example:

2. break statement:
It is used to skip over a part of the code i.e. we can premature exit from a loop such as while, do-while, for or switch.

3. continue statement:
It bypasses one iteration of the loop.

4. exit(0) function:
It is used to terminate the program. For this the header file cstdlib must be included.

Question 2.
Mr. X wants to get an output 9 when inputting 342 and he also wants to get 12 when inputting 651. Write the program and draw a suitable flowchart for X?
Answer:

Question 3.
Explain conditional statements in detail?
Answer:
1. Simple if:
The syntax is given below if(expression)
statement;

or

if(expression)
{
Block of statements
}
First expression evaluates if it is true then only statement will be executed.
eg: if (n>0)
cout<<n<<” is positive”;

2. if else:
The syntax is given below, if (expression)
statement 1;
else
statement 2;

or

if (expression)
{
statement block 1;
}
else
{
statement block 2;
}
First expression evaluates if it is true statement block 1 will be executed otherwise statement block 2 will be executed. Only one block will be executed at a time so it is called branching statement.
eg:
if (n>0)
cout<<n<<” is positive”;
else
cout<<n<<” is negative”;

3. if else if ladder:
The syntax will be given below
if (expression!)
{
statement block 1;
}
else if (expression 2)
{
statement block 2;
}
else if (expression 3)
{
statement block 3;
}
else
{
statement block n;
}
Here first expression 1 will be evaluated if it is true only the statement blockl will be executed otherwise expression 2 will be executed if it is true only the statement block 2 will be executed and so on. If all the expression evaluated is false then only statement block n will be evaluated .
eg:
If (mark>=90)
cout<<“Your grade is A+”;
else if (mark>=80)
cout<<“Your grade is A”;
else if (mark>=70)
cout<<“Your grade is B+”;
else if (mark>=60)
cout<<“Your grade is B”;
else if (mark>=50)
cout<<”Your grade is C+”;
else if (mark>=40)
cout<<“Your grade is C”;
else if (mark>=30)
cout<<“Your grade is D+”;
else
cout<<“Your grade is D”;

4. conditional operator:
It is a ternary operator and it is an alternative for if else construct. The syntax is given below.
expression 1? expression 2: expression 3;

or

expression 1? Value if true : value if false;
Here expression 1 will be evaluated if it true expression 2 will be executed otherwise expression 3 will be executed.
eg:
n>0?cout<<n<<” is positive”:cout<<n<<” is negative”;

5. Switch:
It is a multiple branch statement. Its syntax is given below.
switch(expression)
{
case value: statements;break;
case value: statements;break;
case value: statements;break;
case value: statements;break;
case value: statements;break;
……..
default : statements;
}
First expression evaluated and selects the statements with matched case value.
eg:
switch (n)
{
case 1: cout<< “Sunday”;break;
case 2: cout<< “Monday”;break;
case 3: cout<< “Tuesday”;break;
case 4: cout<< “Wedesday”;break;
case 5: cout<< “Thursday”;break;
case 6: cout<< “Friday”;break;
case 7: cout<< “Saturday”;break;
default : cout<< “lnvalid”
}

Question 4.
Explain different loops in detail?
1. For loop:
The syntax of for loop is for(initialization; checking ; update loop variable)
{
Body of loop;
}
First part, initialization is executed once, then checking is carried out if it is true the body of the for loop is executed. Then loop variable is updated and again checking is carried out this process continues until the checking becomes false. It is an entry controlled loop.
eg: for(i=1,j=1;i<=10;i++,j++)
cout<<i<<” × “<<j<<” = “<<i × j;

2. While loop:
It is also an entry controlled loop The syntax is given below
Loop variable initialised while(expression)
{
Body of the loop;
Update loop variable;
}
Here the loop variable must be initialised outside the while loop. Then the expression is evaluated if it is true then only the body of the loop will be executed and the loop variable must be updated inside the body. The body of the loop will be executed until the expression becomes false.
eg:
i = 1;
j = 1;
while(i<=10)
{
cout<<i<<” × “<<j<<” = “<<i × j; i++;
j++;
}

3. do While loop:
It is an exit controlled loop. The syntax is given below
do
{
Statements
}while(expression);
Here the body executes atleast once even if the condition is false. After executing the body it checks the expression if it false it quits the body otherwise the process will be continue.

Question 5.
Write a program to do the following:

1. Inputs the values for variables ‘n’ and ‘m’.
2. Prints the numbers between ‘m’ and ‘n’ which are exactly divisible by ‘m’.
3. Checks whether the numbers divisible by ‘m’ are odd or even.

OR

Write a program using nested loop that inputs a number ‘n’ which generates an output as follows. Hint: if the value of ‘n’ is 5, the output will be as ‘n’
Answer:
1.
25
25 16
25 16 9
25 16 9 4
25 16 9 4 1

2.
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int i,n,m;
cout<<“Enter values for n and m”;
cin>>n>>m;
for(i=1;i<=n;i++)
if(i%m == 0)
cout<<i<<“,”;
getch();
}

3.
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int i,n,m;
cout<<“Enter values for n and m”;
cin>>n>>m;
for(i=1;i<=n;i++)
if(i%m == 0)
{
cout<<i<<“\t”;
if(i%2 == 0)
cout<<“even”<<endl;
else
cout<<“odd”<<endl;
}
getch();
}

OR

#include<iostream.h>
#include<conio.h>
#include<string.h>//for strlen()
main()
{
clrscr();
int n,i,j;
cout<<“enter a value for n:”;
cin>>n;
for(i=n;i>0;i- -)
{
for(j=n;j>=i;j~)
cout<<j × j<<“\t”;
cout<<endl;
}
getch();
}

Question 6.
Write a C++ program to display Fibonacci series. (SAY-2015)
Answer:

Question 7.
1. Write a C++ program to accept an integer number and check whether it is an Armstrong number or not. (Hint: Sum of the cubes of the digits of an Armstrong number is equal to that number itself)

OR

2. rite a C++ program to accept an integer number and print its reverse (Hint: If 234 is given, the output must be 432).
Answer:
1.

2. #include<iostream>
void main()

 

Question 8.
1. Write a menu driven program which accepts 3 numbers and show options to find and display.

• the biggest number
• the smallest number
• the sun of the numbers
• the product of the numbers

OR

2. Write a C++ program to check whether a number is palindrome or not.
Answer:
1.

OR
2.

Question 9.
Answer any one question from 22(a) and 22(b).
1. Write a C++ program to display all leap years between 1000 and 2000 excluding all century years.

OR

2. Write a C++ program to find the sum of the first 10 numbers of Fibonacci series. (Fibonacci series is 0, 1, 1,2, 3, 5, 8, 15 where 0 and 1 are the first two terms and reamaining terms are obtained by the sum of the two preceding terms.)
Answer:
1.

OR
2.

Question 10 (MARCH-2017)
Write a program to check whether the given number is palindrome or not. (MARCH-2017) (5)

OR

Write a program to print the leap years between 2000 and 3000.
(A century year is leap year only if it is divided by 400 and a noncentury year is leap year only if it is divided by 4).
Answer:

OR

Students can Download Chapter 3 Morphology of Flowering Plants Questions and Answers, Plus One Botany Chapter Wise Questions and Answers helps you to revise the complete Kerala State Syllabus and score more marks in your examinations

Kerala Plus One Botany Chapter Wise Questions and Answers Chapter 3 Morphology of Flowering Plants

Plus One Botany Morphology of Flowering Plants One Mark Questions and Answers

Question 1.
Which plant part is modified into a pitcher in pitcher plants?
(a) stem
(b) leaf
(c) flower
(d) root
Answer:
(b) leaf

Question 2.
Marginal placentation is generally found in the family
(a) Solanaceae
(b) Fabaceae
(c) Liliaceae
(d) Cucurbitaceae
Answer:
(b) Fabaceae

Question 3.
Nonendospermic seeds are found in
(a) pea
(b) groundnut
(c) beans
(d) all of these
Answer:
(d) all of these

Question 4.
Monocotyledonous seed possess a cotyledon which is represented by
(a) teg men
(b) endosperm
(c) scutellum
(d) aleurone
Answer:
(c) scutellum

Question 5.
Which floral family has (9) + 1 arrangement of anthers in the andoecium
(a) Malvaceae
(b) Fabaceae
(c) Solanaceae
(d) Liliaceae
Answer:
(b) Fabaceae

Question 6.
Based on the relationship, fill in the blanks.

1. Prop root: Support
   Pneumatophore: ……….
2. Transpiration: Stomata
   Guttation: ……….

Answer:

1. breathing /respiration
2. Hydathode

Question 7.
The arrangement of petals in the flower is known as
Answer:
Aestivation

Question 8.
When your teacher asked to write a few examples for root modifications, a student wrote Potato. Is it correct? Why ?
Answer:
No. Stem modification

Question 9.
Write the name of the family which has the given floral formula.

Answer:
Solanaceae

Question 10.
Observe the relationship between first two words and fill up the suitable word in the next place.

1. Shoot – plumule: Root …………..
2. Outer integument – testa: inner integnment ……….

Answer:

1. Radicle
2. tegmen

Question 11.
Observe the first pair in a and b and then complete the second pair.

1. gourd – Tendril
   citrus – …………
2. Brinjal – Hypogynous flower
   Rose – …………..

Answer:

1. Thom
2. Epigynous

Question 12.
Identify the family having the given floral formula.

Answer:
Papilionaceae

Question 13.
“Stilt roots are adventitious and give mechanical support’’. How does prop root help the plant?
Answer:
Support the horizontal branches.

Question 14.
“Some flowers are called perigynous”. What do you mean by it?
Answer:
Ovary half inferior or half superior.

Question 15.
From the following terms relating a flower, write its floral formula.
Bisexual; sepals 5 and united petal 5 and united; stamens 5 and epipetalous, carpels 2 and Syncarpous, superior..
Answer:
Solanaceae

Question 16.
Based on morphology pick up the odd one and state reason for your selection (Carrot, Beetroot, Potato, Sweetpotato, radish).
Answer:
Potato- because it is a stem modifications.

Question 17.
Phyllotaxy is the arrangement of leaves on the branch. Identify the order of plants showing Alternate, opposite and Whorled phyllotaxy in the following.
(a) China rose, Calotropis, Nerium
(b) Nerium, China rose, Caltropis
(c) Nerium, Caltropis, China rose
(d) China rose, Nerium, Caltropis
Answer:
(a) China rose, Calotropis, Nerium

Plus One Botany Morphology of Flowering Plants Two Mark Questions and Answers

Question 1.
Identify the types of aestivation in the following diagrams. Justify your answer.

Answer:

• Valvate aestivation – Petals touching each other.
• Imbricate aestivation – petals arranged as one completely in, one completely out & others in and out.

Question 2.
“Potato is a stem and sweet potato is a root”. Justify the statement on the basis of external features only.
Answer:
Potato has distinct nodes and internodes whereas sweet potato does not have nodes and internodes. Potato tuber has scale leaves while sweet potato does not have scale leaves.

Question 3.
Identify the given family. Write the floral formula, mention the economic importance.

1. Bisexual, actinomorphic
2. Perianth six
3. Valvate aestivation
4. Ovary superior, Prilocular with many ovules.

Answer:

Question 4.
Note the difference between the placenta and thalamus.
Answer:

• Placenta – Region with which ovules are attached to ovary.
• Thalamus – Region where floral parts are attached

Question 5.
Based on the relationship, fill in the blanks.

1. Prop root: Support
   Pneumatophore: …………
2. Transpiration: Stomata
   Guttation: …………….

Answer:

1. Breathing
2. Hydathode

Question 6.

1. Identify the type of placentation given below.
2. Differentiate between apocarpous and syncarpous condition

Answer:

1. marginal, axile, parietal, freecentral,basal
2. apocarpous – free carpels.
   Syncarpous – fused carpels

Question 7.
In early morning, on the margins of leaves water drops are seen. Why does it occur?
Answer:
Guttation – The lose of water in the form of water droplets through water stomata seen on the margin on the leaves.

Question 8.
You are provided with the rhizome of a ginger plant.

1. Name the part of the plant modified to form this structure.
2. Write any three differentiating characters.

Answer:

1. Stem
2. Presence of Node, internode, terminal bud, axillary buds & scale leaves.

Question 9.
The following diagrams show different types of placentation.

1. Name the type of placentations.
2. write one example for each placentation.

Answer:

1. Marginal, Basal
2. Pea & Sunflower

Question 10.
L.S of maize seed is given below.Observe the diagram and label the parts.

Answer:

1. Endosperm
2. Scutellum
3. Coleoptile
4. Plumule

Question 11.
The floral formula of a flower is

1. Identify the family.
2. Write the characters of androecium and gynoecium of this family.

Answer:

1. Solanaceae
2. Androecium – Five stamens epipetalous
   Gynoecium – bicarpellary, syncarpous, superior ovary.

Question 12.
Expand the floral formula

Answer:
zygomorphic bisexual pentamerous gamosepalous papilionaceous corolla diadelphous – Androecium. Gynoecium – superior.

Question 13.
Observe the following diagram and answer to the following Questions.

1. Name the part of the plant modified in ‘A’ and ‘B’.
2. Mention their functions.

Answer:

1. A – Taproot B – Adventitious root
2. A – Storage B – Respiration

Question 14.
The rhizome of ginger is found underground. But it is not root. Give reason.
Answer:
It has nodes, internodes, scale, leaves, axillary bud, terminal bud, adventitious root etc.

Question 15.
How is pinnately compound leaf different from palmately compound leaf?
Answer:
When a number of leaflets are present on either sides of a common axis, rachis it is pinnately compound leaf. Rachis represents the midrib of leaf. Eg. Neem When the leaflets are attached at a common point like fingers on palm it is palmately compound leaf. Eg. Bombax or silk cotton.

Question 16.
Identify the phyllotaxy of A and B

Answer:
(a) Alternate
(b) Oppositemedicinal.

Question 17.
Roots obtain oxygen from air in the soil for respiration. In the absence or deficiency of 02, root growth is restricted or completely stopped. How do the plants growing in marshlands or swamps obtain their 02 required for root respiration?
Answer:
In marshy area, the plants get 02 through special roots called pneumatophores or respiratory roots.Such roots are negatively geotropic.

Question 18.
During a feild trip to the coastal areas of Kochi, your team saw many trees growing in swampy areas, when thourdughly observed they found many roots growing upwards above the soil level.

1. In your opinion what kind of roots were seen in that trees?
2. How do these roots help the trees?

Answer:

1. Pneumatophore
2. Gaseous exchange

Question 19.
Rhizome of ginger is like the roots of other plants that grows underground. Despite this fact ginger is a stem and not a root. Justify.
Answer:
Because it possess nodes and internodes, buds, scale leaf, and adventitious roots. Hence these are stem characters.

Question 20.
Tendrils are found in the following plants. Identify whether they are stem tendrils or leaf tendrils,
a. Cucumber
b. Peas
c. Pumpkins
d. Watermelons
Answer:
a,c,d – stem tendril b – leaf tendril

Question 21.
You have heard about several insectivorous plants that feed on insects. Nepenthes or the pitcher plant is one such example, which usually grows in shallow water or in marshlands. What part of the plant is modified into a pitcher1? How does this modification help the plant for food even though it can photosynthesize like any other green plant?
Answer:
Lamina, Plant get additional nutrition (nitrogen) from the digested insect body.

Question 22.
Mangrove plants have negatively geotropic roots

1. Name the root
2. Identify its function

Answer:

1. Pneumatophore
2. Gaseous exchange

Question 23.
1. Write the floral formula of the flower having following description (Bisexual, Zygomorhic, Calyx 5 gamosepalous, Corolla 5 polysepalous, vexillary aestivation, Androecium 10 (stamens 9 united and1 free), Gynoecium 1 carpel, ovary superior)
2. Identify the family of the flower
Answer:

1. K₍₅₎C _{1 + 2 + (2)} A_{(9) + 1}G1
2. Fabaceae

Question 24.
The following diagrams show different types of placentation.

1. Name the types of placentations?
2. Write one example for each placentations?

Answer:

1. Marginal and Basal placentation
2. Marginal – pea, Basal – sunflower

Question 25.
Dicot and monocot leaves shows differences on their leaves mostly in the arrangement of veins, explain it.
Answer:
In Dicot, the veins are repeatedly branched to form network. This is called Reticulate venation. In Monocot, the veins run parallel to one another. This is called Parallel venation.

Question 26.
What is placentation ?Give two types with example.
Answer:
It is the mode of arrangement of ovules in an Ovary

1. Axile placentation – Arrangement of ovules in the axis of ovary having septa.
2. Free central placentation – Arrangement of ovules in the central part of ovary without having septa.

Question 27.
Common functions of roots are absorption, fixation and conduction. Besides these, roots perform other functions. Justify this statement with two example.
Answer:
1. In addition to absorption, fixation, and conduction, roots perform mechanical support, eg -prop root and stilt root.

2. Some are Breathing roots eg:- Pneumatophore.

Question 28.
Differentiate between
Hypogynous and Epigynous
Answer:

1. In hypogynous flower the position of Gynoecium is superior to all other floral whorls.
2. In epigynous flower the position of Gynoecium is inferior to all other floral whorls.

Question 29.
A list of some plant parts are given below. Note the morphological modification in each item.

1. Carrot
2. Tapioca
3. Potato
4. Ginger

Answer:

1. Carrot – Tap root modification
2. Tapioca – Adventitious root modification
3. Potato – Underground stem modification
4. Ginger – Underground stem modification

Question 30.
Some flowers are called perigynous”. What do you mean by it?
Answer:
In such flowers ovary is half inferior that means position of ovary comes to the same level of other floral whorls lies.
Eg:- plum, rose, and peach

Question 31.
How is pinnately compound leaf different from palmately compound leaf?
Answer:
1. In pinnately compound leaf lamina divided into number of leaflets. It is due to the incisions touch the midrib Eg:- Neem.

2. In palmately compound leaf, lamina is divided into number of leaflets, they are arranged like fingers on the palm Eg:- Silk cotton

Question 32.
When your teacher asked to write a few examples for root modifications, a student wrote Potato. Is it correct? Why ?
Answer:
No, Potato is an example of underground stem modification.

Question 33.
How can you differentiate between free central and axile placentation?
Answer:
In free central placentation ovules are arranged at central axis of ovary without septa but in axile placentation ovules are arranged at central axis of ovary with septa/ cross walls.

Question 34.

1. Name the aestivations given below
2. Give an example for each

Answer:
1. Twisted and imbricate
Hibiscus and cassia

Question 35.
Potato is a stem and sweet potato is a root”. Justify the statement on the basis of external features only.
Answer:
Potato is an underground stem. It possess adventitious bud, nodes and internodes Sweet potato is adventitious root modification. It possess root hairs and stores food.

Question 36.
The floral formula of a family is given below Give two examples for economically important plants

Answer:

• Indigofera – dye obtained
• Sesbania- Used as Fodder

Question 37.
The mature seeds of plants such as gram and peas possess no Endosperm. Why?
Answer:
Endosperm gets used up by the developing embryo during seed development.

Question 38.
Match the following.

Group A	Group B
A.  Aleurone layer B.  Parthenocarpic fruit C.  Ovule D.  Endosperm	i.    without fertilization ii.    Nutrition iii.   Double fertilization iv.  Seed

Answer:
A – iv
B – i
C – iii
D – ii

Question 39.
Mango and coconut are ‘drupe’ type of fruits. In mango fleshy mesocarp is edible.

1. What is the edible part of coconut?
2. What does milk of tender coconut represent?

Answer:

1. Endosperm
2. Liquid endosperm (free nuclear endosperm)

Question 40.
The mode of arrangements of sepals or petals in a floral bud is known as aestivation. Draw the various types of aestivation possible for a typical pentamerous flower.
Answer:

Question 41.
Give the technical term and examples of the flowers given here based on the position of the ovary.
Answer:
Hypogynous- hibiscus and perigynous- plum and rose.

Question 42.
Modified adventitious roots in Banyan tree and Maize plant are known in different names

1. Which are they?
2. Give its function

Answer:

1. Banyan tree – Prop root, Maize plant-Stilt root
2. Mechanical support

Question 43.
Thorns and spines are different modified structures in citrus and cactus.

1. Which plant part is modified ?
2. Give its function.

Answer:

1. Thorns – stem modification, Spines – Leaf modification
2. protective function

Question 44.
Some important family characters are given below flowers are zygomorphic, Hypogynous, monocarpellary ovary, anthers diadelphous, and papilionaceous corolla

1. Identify the family
2. Give 2 economically important plants

Answer:

1. Fabaceae
2. dye – Indigofera, fodder yielding – sesbania and Trifolium

Question 45.
Give the technichal term of the following

1. Two leaves at each node
2. flowers cannot be divided into two equal halves
3. position of ovary is higher than other floral whorls
4. carpels are fused

Answer:

1. opposite phyllotaxy
2. asymmetric
3. Hypogynous flower
4. syncarpous

Question 46.
Mention the statement given below are true or false

1. In axile placentation ovules are arranged in axis of single-chambered ovary
2. In Imbricate aestivation floral appendages are in irregular overlapping
3. In Alstonia phyllotaxy is whorled
4. Floral axis has definite growth in racemose type

Answer:

1. False
2. True
3. True
4. False

Plus One Botany Morphology of Flowering Plants Three Mark Questions and Answers

Question 1.
Justify the following statements on the basis of external features.

1. Underground parts of plants are not always roots
2. Flower is a modified shoot

Answer:
1. Underground stem get modified for different purposes like food storage, reproduction and perennation. They can be recognized from root in having nodes, internodes,scale leaves, terminal bud &axillary bud eg. Rhizome – ginger, stem tuber- potato.

2. A flower can be considered as a modified shoot because each whorl of a flower represents each node. The leaves at each node is modified to perform functions like protection, attraction and reproduction. The internodes are compressed to form a flower.

Question 2.

1. What is meant by modification of root?
2. What type of root is found in
   • banyan tree
   • turnip
   • mangrove tree root modification is the change in shape and structure of root for performing functions other than absorption and conduction.

Answer:

1. It is modified for performing different functions.
2. • Modification of root in banyan tree-prop roots- for mechanical support
   • Turnip-napiform modification – for food storage
   • Mangrove tree-pneumatophores – respiration

Question 3.
Some characters of a flower is given below. Bisexual, sepals 5 and united, Petals 5 and united, stamens 5 and epipetalous, carpels 2, syncarpous and superior ovary.

1. Write its floral formula.
2. Identify the family.
3. List any two economically important plants belonging to this family.

Answer:
1.

2. Solanaceae
3. Potato – Solanum tuberosum Tomato – Lycopersicum esculentum

Question 4.
A particular flower of a family is characterised by this type of aestivation.

a) Identify the family.
b) Write the floral formula.
c) Mention two economic importance of the family.
Answer:

Question 5.
Observe the relationship between first two words and fill up the suitable word in the fourth place.

1. Shoot – plumule: Root ………..
2. Nepenthes – pitcher: Utricularia …………
3. Outer integument – testa: inner integument …………..
4. Ovule – seed: Ovary – …………..

Answer:

1. Radicle
2. Bladder
3. Tegmen
4. Fruit

Question 6.
Label the regions of the root tip in the given diagram.

Answer:

1. Root cap
2. Meristematic
3. Region of elongation
4. Root hair region

Question 7.
The arrangements of ovules within the ovary is known as placentation.

1. What does the term placenta refer to?
2. Name and draw various types of placentations in the flower as seen in T.S. or V.S.

Answer:
1. Placenta It is the cushion-like structure in which ovules are arranged.
2.

Question 8.
Define the following terms.

1. Aestivation:
2. Placentation:
3. Actinomorphic:
4. Zygomorphic:
5. superior ovary:
6. Perigynous flower:
7. Epigynous

Answer:

1. Aestivation: Arrangement of sepals and petals in an unopened flower bud.
2. Placentation: The mode of arrangement of ovules within the ovary
3. Actinomorphic: When a flower can be divided into two equal radial halves at any radial plane. Eg: Chinarose.
4. Zygomorphic: When a flower can be cut into two equal halves only in one vertical plane. Eg: pea.
5. Superior ovary: When gynoecium occupies superior or highest position while other parts are situated below it. Eg: Mustard.
6. Perigynous flower: If the gynoecium is at the centre and all other, parts arise on the rim of the thalamus. Eg: Rose

Question 9.
Differentiate between

1. Racemose and cymose inflorescence.
2. Fibrous and adventitious root
3. Apocarpous and syncarpous ovary.

Answer:
1. Racemose:The axis or peduncle shows indefinite growth. Flowers are arranged in acropetal succession.
Cymose: the axis or peduncle shows definite growth or ends in a flower. Flowers are arranged in basipetal succession.

2. Fibrous: The primary root stops its growth and lateral roots arise from the base of the stem.
Adventitious: The roots arise from the part of the plant other than the radicle.

3. Apocarpous: When the carpels of ovary are free.
Syncarpous: When the carpels of ovary are fused.

Question 10.
Floral characters of a plant are given below: Pentamerous flowers, Polypetalous, Stamens 5, Polyandrous, Bicarpellary Syncarpous, Swollen placenta, Oblique ovary.
a) Name the Family of this plant belongs.
b) Write the floral formula of this family.
c) Give two examples with its importance.
Answer:

Plus One Botany Morphology of Flowering Plants NCERT Mark Questions and Answers

Question 1.
How is a pinnately compound leaf different from a plamately compound leaf?
Answer:
1. Pinnately Compound Leaf.
In pinnately compound leaf a number of leaflets are present on a common axis. Example, neem leaves.

2. Palmately Compound Leaf.
In palmately compound leaf number of leaflets are attached at the common point. Example, cotton leaves.

Question 2.
Explain with suitable examples the different types of phyllotaxy.
Answer:
1. Phyllotaxy. Phyllotaxy is the pattern of arrangement of leaves on the stem or branch. This is usually of three types – alternate, opposite and whorled.

2. In alternate type of phyllotaxy, a single leaf arises at each node in alternate manner, as in china rose, mustard and sunflower plants.

3. In the Opposite type, a pair of leaves arise at each node and lie opposite to each other as in Calotropis and guava plants.

4. If more than two leaves arise at a node and form a whorl, it is called whorled, as in Alstonia.

Question 3.
What is meant by modification of root? What type of modification of root is found to the :

1. Banyan tree
2. Turnip
3. Mangrove trees

Answer:
The Primary function of the root is absorption of water and minerals and giving mechanical support to the plant. Sometimes roots get modified to carry out other functions like storage of food or additional mechanical support.

1. Banyan Tree. In banyan trees long roots develop from branches and they hanging deep down to reach the ground. They are providing additional mechanical support to the huge banyan tree. This modification is called a prop root.

2. Turnip. In turnip the root is modified to store extra food.

3. Mangrove Trees. Mangrove trees are found in marshy area. The roots are modified into pneumatophore providing extra passage to allow additional oxygen to the plant.

Plus One Botany Plant Kingdom Multiple Choice Questions and Answers

Question 1.
The obliquely growing roots that provides mechanical support to the main stem are
(a) prop root
(b) stilt root
(c) pneumatophore
(d) pillar root
Answer:
(b) stilt root

Question 2.
Lateral branches arise from the base of main stem that grows aerially at first and arch downwards in
(a) pistia
(b) mint
(c) jasmine
(d) both b & C
Answer:
(d) both b & C

Question 3.
Pulvinus is found in the leaf base of
(a) Rosaceae
(b) Leguminosae
(c) Malvaceae
(d) Solanaceae
Answer:
(b) Leguminosae

Question 4.
The appearance of more than one leaf at each node is represented by
(a) china rose
(b) sunflower
(c) Alstonia
(d) guava
Answer:
(c) Alstonia

Question 5.
Roots are significant in the exchange of gases
(a) pneumatophore
(b) stilt root
(c) pillar root
(d) assimilatory root
Answer:
(a) pneumatophore

Question 6.
The type of flower cannot be divided into two similar halves in any vertical plane through centre is
(a) actinomorphic
(b) zygomorphic
(c) asymmetric
(d) both b & c
Answer:
(c) asymmetric

Question 7.
Ovary half inferior is seen in
(a) plum
(b) china rose
(c) peach
(d) both a & c
Answer:
(d) both a & c

Question 8.
Find out the papilionaceous type of corolla from the given figure.

(a) A
(b) B
(c) C
(d) D
Answer:
(d) D

Question 9.
9. Flowers with bisexual, zygomorphic, diadelphous and monocarpellary superior ovary are the characteristic feature of
(a) fabaceae
(b) malvaceae
(c) solanaceae
(d) liliaceae
Answer:
(a) fabaceae

Question 10.
The type of placentation given here is

(a) axile
(b) basal
(c) marginal
(d) parietal
Answer:
(d) parietal

Question 11.
Hilum is found in
(a) embryo
(b) seed coat
(c) radicle
(d) chalaza
Answer:
(b) seed coat

Question 12.
Ashwagandha is represented by the family
(a) Fabaceae
(b) papillionaceae
(c) Solanaceae
(d) Liliaceae
Answer:
(c) Solanaceae

Question 13.
The family represented by the floral formula given below is

(a) fabaceae
(b) papillionaceae
(c) solanaceae
(d) liliaceae
Answer:
(c) solanaceae

Question 14.
Negatively geotropic roots are seen in
(a) zaminkand
(b) Rhizophora
(c) maize
(d) euphorbia
Answer:
(b) Rhizophora

Question 15.
In the following picture, plant part is modified for

(a) storage
(b) respiration
(c) support
(d) protection
Answer:
(a) storage

Question 16.
When the filaments of stamens are attached to the perianth, the condition is
(a) Epiphyllous
(b) epipetalous
(c) adelphous
(d) syngenesious
Answer:
(a) Epiphyllous

Question 17.
In China rose, five carpels are fused at base. This condition is called
(a) Pentacarpellary, syncarpous and pentalocular
(b) Pentacarpellary, apocarpous and pentalocular
(c) polycarpellary, syncarpous and penalocular
(d) Pentacarpellary, syncarpous and multilocular
Answer:
(a) Pentacarpellary, syncarpous and pentalocular

Students can Download Chapter 7 Body Fluids and Circulation Questions and Answers, Plus One zoology Chapter Wise Questions and Answers helps you to revise the complete Kerala State Syllabus and score more marks in your examinations.

Kerala Plus One Zoology Chapter Wise Questions and Answers Chapter 7 Body Fluids and Circulation

Plus One Body Fluids and Circulation One Mark Questions and Answers

Question 1.
Name the double walled membrane of human heart. (Cuticle, Pleura, Pericardium, Sarcolemma)
Answer:
Pericardium

Question 2.
Which metal is responsible for blood clotting?
(a) Iron
(b) Calcium
(c) Copper
(d) Magnesium
Answer:
(b) Calcium

Question 3.
In a case sheet, doctor denoted a patients BP as 140/90. What it shows?
Answer:
Hypertension

Question 4.
Mark the pair of substances among the following which is essential for coagulation of blood.
(a) Heparin and calcium ions
(b) Calcium ions and platelet factors
(c) Oxalates and citrates
(d) Platelet factors and heparin
Answer:
(b) Calcium ions and platelet factors

Question 5.
Which one of the following type of cells lack nucleus?
(a) RBC
(b) Neutrophils
(c) Eosinosphils
(d) Monocytes
Answer:
(a) RBC

Question 6.
ECG depicts the depolarisation and repolarisation processes during the cardiac cycle. In the ECG of a normal healthy individual one of the following waves is not represented.
(a) Depolarisation of atria
(b) Repolarisation of atria
(c) Depolarisation of ventricles
(d) Repolarisation of ventricles
Answer:
(b) Repolarisation of atria

Question 7.
Which one of the following blood cells is involved in antibody production?
(a) B-Lymphocytes
(b) T-Lymphocytes
(c) RBC
(d) Neutrophils
Answer:
(a) B-Lymphocytes

Question 8.
The cells involved in inflammatory reactions are
(a) Basophils
(b) Neutrophils
(c) Eosinophils
(d) Lymphocytes
Answer:
(a) Basophils

Question 9.
Name the incompatibility observed between the Rh-ve blood of a pregnant mother with Rh+ve blood of the foetus.
Answer:
Erythroblastosis foetalis

Question 10.
Tricuspid valve is present in between _______ and _________?
(a) Right auricle and right ventricle
(b) Left auricle and left ventricle
(c) Right auricle and left auricle
(d) Right ventricle and left ventricle
Answer:
(a) Right auricle and right ventricle

Question 11.
Rhythmic heartbeat is maintained by a highly specialized excitatory and conductive system. The correct sequence of events will be
(a) AV node → Bundle of His → S A node → Purkinje fibers
(b) Purkinje fibers → AV node → S A node → Bundle of His
(c) A V node → S A node → Bundle of His → Purkinje fibers
(d) S A node → A V node → Bundle of His → Purkinje fibers
Answer:
(d) S A node → A V node → Bundle of His → Purkinje fibers

Question 12.
The normal cardiogram of man is shown below.

In the diagram, QRS wave has largest amplitude, which represents ventricular depolarization. What condition is obtained if QRS wave is enlarged?
Answer:
Myocardial infarction or cardiac arrest.

Plus One Body Fluids and Circulation Two Mark Questions and Answers

Question 1.
The diagrammatic figure given below represents two types of blood circulations.

1. Identify the A and B
2. Write hepatic portal system

Answer:

1. A – Pulmonary circulation B – Systemic circulation
2. Hepatic portal system is a portal system which carries blood from intestine to liver.

Question 2.
Doctor advised to administer Anti Rh antibodies to Seetha immediately after the first delivery. Justify this statement.
Answer:
If the mother’s blood group is Rh- and foetus blood group is Rh+, there is chance for the condition of erythroblastosis foetalis. This can be avoided by administering Anti-Rh antibodies to the mother immediately afterthe delivery of the first child.

Question 3.

1. Identify A & B
2. Mention the role of A in the myogenic property of Heart.

Answer:
1. A – SA node B – AV node

2. In myogenic heart cardiac impulse in originated from SA node. So the SA node is called pacemaker. The rate of heart beat in determined by the rate of discharge of cardiac impulse from SA node.

Question 4.
Silicosis, T.B., Pneumonia, asbestosis are the diseases affecting respiratory system. Name four diseases affecting circulatory system.
Answer:

1. Hypertension
2. Coronary artery disease (CAD)
3. Angina
4. Heart failure

Question 5.
The average life span of RBC is 120 days.

1. Write the places where RBC is produced and destroyed?
2. Name respiratory pigment in Human RBC.

Answer:

1. RBS are produced in red bone marrow and destroyed in spleen
2. Haemoglobin

Question 6.
The stroke volume of a normal person is 70ml/min. Find out his cardiac output?
(Hint: Cardiac output = stroke volume × No. of heartbeats/min.)
Answer:
HP No.of heartbeats/min = 72
Stroke volume = 70
Cardiac output = 70 × 72 = 5040 ml

Question 7.
Suppose your friend is suffering from obesity, diabetes and hypertension, etc. What are the type of food materials would you suggest?
Answer:
Fried items and bakery items must not be used. Sugar and sugary materials should be avoided. Fiber-rich vegetarian food is recommended.

Question 8.
Study the table. Correct the mistakes to match column A, B & C.

Answer:

Question 9.
Copy the diagram and fill (a) and (b).

Answer:
(a) Hypertension

(b) Coronary Artery Disease.

Question 10.
Complete the table.

Answer:

Question 11.
Observe the diagram.

1. Which step of cardiac cycle is shown here?
2. Which sound is produced during the step and how is it produced?

Answer:

1. Ventricular systole
2. The ‘lub’ sound. This is produced by the closing of AV valve in orderto prevent backward flow of blood to auricle.

Question 12.
Some of the features of the body fluids are listed below. Analyse the features and categorise them into two groups.

1. Transparent fluid found in tissue space.
2. Extra cellular fluid of the blood.
3. Contains 91% water, 7% proteins and 1% inorganic and organic substances.
4. Absorbs the digested fats and lipids and transports in the form of chylomicrons.

Answer:

Plasma	Lymph
2. Extra cellular fluid of blood	1. Transparent fluid found in tissue space
3. Contains 91% water, 7% proteins and 1% inorganic and organic substances	4. Absorbs the digested fats and lipids and transports in the form chylomicrons

Question 13.
‘Bundle of His’ is divided into finer branches known as Purkinje Tissue. Impulses are conducted rapidly along these fibres at 5 m/s and spread from these to all parts of the chambers.

1. What is the function of Purkinje Tissue?
2. Which are the chambers mentioned in the paragraph?

Answer:

1. Conduction of impulse from the Bundle of His and rapidly transfers to the wall of the ventricles,
2. Right and Left ventricles

Question 14.
“All veins carry deoxygenated blood and all arteries carry oxygenated blood.”

1. Do you agree?
2. Justify your answer.

Answer:
1. Statement is incorrect.

2. Arteries are the blood vessels which carry blood away from the heart. Veins are the blood vessels which carry blood towards the heart. All arteries carry oxygenated blood except pulmonary artery.

All veins carry deoxygenated blood except pulmonary vein. Pulmonary artery carry deoxygenated blood towards the lungs and pulmonary vein carry oxygenated blood toward heart.

Question 15.
Using the terms given, prepare a flow chart incorrect order.
Right auricle, aorta, left ventricle, left auricle, superior vena cava, capillaries, lungs, right ventricle, pulmonary vein, pulmonary artery.
Answer:
Right Auricle → Right ventricle → Pulmonary artery → Lungs → Pulmonary vein → Left Auricle → Left ventricle → Aorta → Capillaries → Superior vena cava → Right Auricle.

Question 16.
Complete the table using ‘open’ or ‘close’.

Answer:

Question 17.
The human blood vascular system is diagrammatically represented below.

1. What is the significance of Pulmonary circulation in the cardiac cycle?
2. Why circulation in human considering as double circulation?

Answer:
1. The to and fro circulation between the lungs and heart is known as Pulmonary circulation. The purpose of pulmonary circulation is oxygenation of blood.

2. In human circulation is double circulation, it involves Pulmonary circulation and systemic circulation. Right half receives and pumps the deoxygenated blood while the left half the oxygenated blood.

Question 18.
You know when you cut your finger or hurt yourself, your wound does not continue to bleed for long time. Usually blood stops flowing after sometime. State how?
Answer:
When blood oozes out of a cut, it set into gel within a few minutes. This is known as coagulation. The mechanism of blood coagulation is as follows.

Question 19.
Copy the table and fill in the gap with appropriate words.

Answer:

Question 20.
Study the diagrammatic representation :

1. ‘X’ marked in the figure is a blood vessel. Name the blood vessel.
2. Give the importance of circulation between these two organs.

Answer:

1. hepatic portal vein
2. hepatic portal vein carries nutrients from intestine to liver.

Question 21.
Heparin is a substance which prevents clotting of blood. Histamine is an anti-inflammatory substance.

1. Mention the leucocytes that secretes the above said substances.
2. Draw and label its nucleus.

Answer:
1. Basophil
2.

Plus One Body Fluids and Circulation Three Mark Questions and Answers

Question 1.
Fill up the blanks with appropriate words.

1. Thrombocytes are produced from _________
2. Pace maker of the heart is _________
3. The nervous band that connects the two cerebral hemispheres is _________

Answer:

1. Megakaryocytes
2. Sino – atrial node (SAN)
3. Corpus callosum

Question 2.
The given figure shows a Systole.

1. Identify the Systole in the figure?
2. How long does it lasts?
3. What happens to the bicuspid and tricuspid valves during this systole?

Answer:

1. Ventricular systole
2. 0.25 seconds
3. Closed

Question 3.
Draw a Schematic diagram showing the circulation of blood in man, starting from left ventricle of heart and ending in the right auricle.

1. Name the type of circulation.
2. Mention the significance of this circulation.

Answer:

1. Systemic circulation
2. The systemic circulation provides nutrients, O₂ and other essential substances to the tissues and takes CO₂ and other harmful substances away for elimination.

Question 4.
A unique vascular connection exists between the digestive tract and liver.

1. Name the vascular connection.
2. Name the vascular connection found in frog between kidney and lower parts of body.
3. What is CAD?

Answer:

1. Hepatic portal system
2. Renal portal system
3. CAD – Coronary Artery Disease

Question 5.
Complete the table using the terms given in bracket. (Lymphocyte, granulocyte, eosinophil, basophil, plasma, leucocyte)

Answer:

• a – Plasma
• b – leucocyte
• c – granulocyte
• d – basophil
• e – Eosinophil
• f – lymphocyte

Question 6.
Observe the diagram given below and answer the questions.

1. Identify the type of circulation.
2. Prepare a flow chart showing the above circulation.
3. Write the purpose of this circulation.

Answer:

1. Pulmonary circulation
2. Right, ventricle → Pulmonary artery → lungs → Pulmonary vein → Left auricle
3. Oxygenation of blood

Question 7.
Leukocytes are the soldiers of the body. Justify?
Answer:
Leukocytes provides defence mechanism to the body against infection. For example Neutrophils and monocytes are phagocytic cells which destroy foreign organisms entering the body.

Basophils secrete histamine, heparin etc. and are involved in inflammatory reactions. Eosinophils resist infections and are also associated with allergic reactions. Lymphocytes are responsible for immune responses of the body.

Question 8.
Listed below are some of the features of open and closed circulatory system. Arrange them into two categories.

1. Usually low-pressure system
2. Found in vertebrates
3. Blood returns to heart rapidly
4. High pressure system
5. Blood returns to heart slowly
6. Found in Arthopods

Answer:

Open circulation	Closed circulation
1. Usually low pressure system	4. High pressure system
5. Blood returns to heart slowly	3. Blood returns to heart rapidly
6. Found in Arthropods	2. Found in vertebrates

Question 9.
The heart of fish is said to be a venous heart, whether your heart is a venous one or not? Justify.
Answer:
The heart of fish is a venous heart, because it is a 2 chambered heart and only deoxygenated blood flows through the heart chambers.
Human heart is four chambered heart and carry both oxygenated and deoxygenated blood. So human heart is not a venous heart.

Question 10.
Observe the diagram.

1. Identify the blood cell A and B.
2. How can they differentiate?
3. What are their function?

Answer:

1. The blood cells A and B
   • A – Monocyte
   • B – Neutrophil
2. They can be differentiated in two ways
   • Monocyte – Agranulocyte, Horseshoe shaped nucleus
   • Neutrophil – Granulocyte, multilobed nucleus
3. Their functions
   • Monocyte – They protect the body by engulfing the pathogen (Phagocytosis)
   • Neutrophil – Phagocytic cells

Question 11.
During a clinical check-up doctor diagnosed that the patient’s heart murmurs.

1. What are murmurs?
2. Why does a heart murmur?
3. The heart sound ‘dub’ is caused by the closure of AV valve. Do you agree with this statement?

Answer:
1. Due to the abnormalities in chambers or valves of the heart, some abnormal sounds may be audible in addition to normal heart sound. These are called murmurs.

2. Heart may murmur due to valvular damage.

3. The statement is incorrect because ‘dub’ is caused by the sudden closure of semilunar valve.

Question 12.
Observe the diagram and answer the following

1. Name the area labelled here.
2. What is the importance of this area?
3. Name the area associated with this.
4. Draw a flow chart showing conducting system of heart.

Answer:

1. Sino-atrial node (SAN)
2. Cardiac impulse originates from SAN.
3. AV node, Bundle of His, Purkinje fibres.
4. SAN → AVN → Bundle of His→ Purkinje fibres → Ventricle.

Question 13.
Match the following.

Answer:

Question 14.
A person’s blood pressure is found to be about 140/ 100mm Hg.

1. What is the condition the person is suffering?
2. How do you measure BP?
3. Blood pressure is 100/60mm Hg. How you interpret it?

Answer:

1. Hypertension
2. Sphygmomanometer
3. Hypotension

Question 15.
The major findings of a health survey conducted in a corporation area are

• 25% of the population are suffering from hypertension.
• 15% of male above 40 years are suffering from various cardiac disorders.

1. List any three cardio vascular disorders.
2. Suggest any two possible reason for this disorders.
3. Suggest any two advices to the disease.

Answer:

1. Hypertension, Atherosclerosis, Cardiac arrest
2. Two possible reason for cardio vascular disorders:
   • Regular intake of fatty food
   • Smoking
   • Lack of exercise
3. Advices to the disease:
   • Avoid fatty food
   • Do regular exercise

Question 16.
Match Column I with Column II.

Column I	Column II
(a) Eosinophils	Coagulation
(b) RBC	Universal Recipient
(c) AB Group	Resist infections
(d) Platelets	Contraction of Heart
(e) Systole	Gas transport

Answer:

Column I	Column II
(a) Eosinophils	Resist infections
(b) RBC	Gas transport
(c) AB Group	Universal Recipient
(d) Platelets	Coagulation
(e) Systole	Contraction of Heart

Question 17.
Select the correct statement from the following:

• Monocyte is a granulocyte.
• Frog has 4 chambered heart.
• Blood is a tissue.
• The respiratory organs of insects are gills.

Answer:

• Blood is a tissue. (Monocyte is an agranulocyte Frog has 3 chambered heart Respiratory organs of insects are trachea)

Question 18.
Today we can measure blood pressure with a sphygmomanometer at home. This shows that people are very much concerned about high blood pressure. Find out why?
Answer:
High blood pressure can harm the vital organs like heart, brain and kidneys. High blood pressure compels the heart to work excessively due to which the congestive heart disease may set in at an early age. This is the reason why people are very much concerned with their high B.P.

Question 19.
Erythroblastosis foetalis is an Rh incompatibility disorder.

1. Describe the circumstances in which erythroblastosis foetalis might arise.
2. How is the problem usually averted?

Answer:
1. If the first child of a Rh- woman is Rh+, she develops anti-Rh antibodies in her blood. During subsequent pregnancies if the foetus is Rh+ and Rh antibodies enter the foetal blood from the mother blood causing agglutination resulting erythroblastosis foetalis.

2. This problem can be avoided by administering anti-Rh antibodies to the mother immediately after the delivery of the first child.

Question 20.
Write the odd one out and give the reason for your answer.

1. P wave, QRS wave, T wave, beta wave.
2. Renal artery, Pulmonary artery, Hepatic artery, Coronary artery.
3. SA node, lymph node, AV node, Purkinje fibres

Answer:

1. Beta wave: These are the waves of normal EEG, whereas all others are the components of a normal ECG.
2. Pulmonary artery: This blood carries deoxygenated blood whereas all others carry oxygenated blood.
3. Lymph node: It is found in lymphatic system whereas all other structures are found in the mammalian heart related to auto rhythmicity.

Question 21.
Cardiac output increases when we engage in physical exercises. However, it may fall after the exercise stops. We can see that it is a fully heart controlled event.

1. What is a cardiac output?
2. How does heart increase cardiac output during exercise?

Answer:

1. Cardiac output is the volume of the blood ejected by. each ventricle into the arterial system per minute,
2. In response to the sensory impulses and the adrenal medullary hormone, the excitability of the pacemaker is increased and thereby heart rate is increased during exercise. This in turn increases the heart rate.

Question 22.
Copy and complete the table on blood group, antigen and antibody.
1.

2. Name the blood groups commonly known as Universal donor and Universal recipient.
Answer:
1.

2. The blood groups commonly known as Universal donor and Universal recipient.

• Universal donor: ‘O’ group.
• Universal recipient: ‘AB’ group.

Plus One Body Fluids and Circulation NCERT Questions and Answers

Question 1.
What is the importance of plasma proteins?
Answer:
Fibrinogen, globulins and albumins are the major proteins. Fibrinogens are needed for clotting or coagulation of blood. Globulins primarily are involved in defense mechanisms of the body and the albumins help in osmotic balance.

Question 2.
Match Column I with Column II:

Column I	Column II
(a) Eosinophils	(i) Coagulation
(b) RBC	(ii) Universal Recipient
(c) AB Group	(iii) Resist Infections
(d) Platelets	(iv) Contraction of Heart
(e) Systole	(v) Gas transport

Answer:

Column I	Column II
(a) Eosinophils	(iii) Resist Infections
(b) RBC	(v) Gas transport
(c) AB Group	(ii) Universal Recipient
(d) Platelets	(i) Coagulation
(e) Systole	(iv) Contraction of Heart

Question 3.
Why do we consider blood as a connective tissue?
Answer:
Blood is considered a connective tissue for two basic reasons:

1. embryologically, it has the same origin (meso-dermal) as do the other connective tissue types and
2. Blood connects the body systems together bringing the needed oxygen, nutrients, hormones and other signaling molecules, and removing the wastes.

Question 4.
Sino-atrial node is called the pacemaker of our heart. Why?
Answer:
Sino-atrial node is a bundle of nerves which initiates the conduction of heartbeat. So, this is also called the pacemaker of our heart.

Question 5.
What is the significance of atrioventricular node and atrioventricular bundle in the functioning of heart?
Answer:
AV Node and atrioventricular bundles are responsible for conduction of cardiac beat cycle to further parts of heart.

Question 6.
Define a cardiac cycle and the cardiac output.
Answer:
Cardiac Cycle. The rhythmic contraction and dilatation of different parts of heart in one beat is called cardiac cycle. Cardiac Output. The heart beats 72 times per minute, i.e., that many cardiac cycles are performed per minute. From this it could be deduced that the duration of a cardiac cycle is 0.8 seconds.

During a cardiac cycle, each ventricle pumps out approximately 70mL of blood which is called the stroke volume. The stroke volume multiplied by the heart rate (no. of beats per min.) gives the cardiac output. Therefore, the cardiac output can be defined as the volume of blood pumped out by each ventricle per minute and averages 5000 mL or 5 litres in a healthy individual.

Question 7.
What is the difference between lymph and bllod?
Answer:

Blood	Lymph
RBC Present	RBC Absent
Found in arteries, veins and capillaries	Found in interstitial space
Can transport gases	Cannot transport gases

Plus One Body Fluids and Circulation Multiple Choice Questions and Answers

Question 1.
In higher vertebrates, SA – node helps in
(a) conduction of blood
(b) initiation of heartbeat
(c) opening of tricuspid valve
(d) opening of bicuspid valve
Answer:
(b) initiation of heartbeat

Question 2.
An oval depression called fossa ovalis, is seen on
(a) inter atrial septum
(b) inter ventricular septum
(c) right auriculo-ventricular septum
(d) left auriculo-ventricular septum
(e) papullary muscles
Answer:
(a) inter atrial septum

Question 3.
The deposition of lipids on the wall lining, the lumen of large and medium-sized arteries is referred to as
(a) deep vein thrombosis
(b) Stokes-Adam’s syndrome
(c) osteoporosis
(d) atherosclerosis
Answer:
(d) atherosclerosis

Question 4.
Which of the following are located in tunica media of human blood vessels?
(a) Collagen fibres and smooth muscle
(b) Squamous epithelium and striated muscle
(c) white fibres and smooth muscle
(d) Yellow fibres and smooth muscle
Answer:
(d) Yellow fibres and smooth muscle

Question 5.
The important function of lymph is to
(a) transport oxygen to the brain
(b) transport carbon dioxide to the lungs
(c) return RBCstothe lymph nodes
(d) return interstitial fluid to the blood
Answer:
(d) return interstitial fluid to the blood

Question 6.
Cardiac output is determined by
(a) heart rate
(b) stroke volume
(c) blood flow
(d) Both (a) and (b)
Answer:
(d) Both (a) and (b)

Question 7.
Which of the following matches correctly?
(a) Inferior vena cava – Receives deoxygenated blood from the head and body
(b) Superior vena – Receives deoxygenated blood from the lower body and organs
(c) pulmonary artery – carries deoxygenated blood to lungs
(d) hepatic artery – carries deoxygenated blood to the gut
Answer:
(c) pulmonary artery – carries deoxygenated blood to lungs

Question 8.
The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be grafted in him. It is likely that it will be grafted at the site made up of
(a) atrioventricular bundle
(b) Purkinje system
(c) sinuatrial node
(d) atrioventricular node
Answer:
(c) sinuatrial node

Question 9.
Generally artificial pacemaker consists of one battery made up of
(a) nickel
(b) dry cadmium
(c) photo sensitive material
(d) lithium
Answer:
(d) lithium

Question 10.
which type of white blood cells are concerned with the release of histamine and the natural anticoagulant heparin?
(a) Neutrophils
(b) Basophils
(c) Eosinophils
(d) Monocytes
Answer:
(b) Basophils

Question 11.
In humans, blood passes from the post caval to the diastolic right atrium of heart due to
(a) pushing open of the venous valves
(b) suction pull
(c) stimulation of the sino-auricular node
(d) pressure difference between the caval and atrium
Answer:
(d) pressure difference between the caval and atrium

Question 12.
which one of the following has an open circulator system?
(a) Pheretima
(b) Periplaneta
(c) Hirudinaria
(d) Octopus
Answer:
(b) Periplaneta

Question 13.
in higher vertebrates, SA – node helps in
(a) conduction of blood
(b) initiation of heartbeat
(c) opening of tricuspid valve
(d) opening of bicuspid valve
Answer:
(b) initiation of heartbeat

Question 14.
The opening of auricles and ventricles on the right side is guarded by
(a) tricuspid valve
(b) bicuspid valve
(c) semilunar valve
(d) Eustachian tube
Answer:
(a) tricuspid valve

Question 15.
Which of the following sequences is truly a systemic circulation pathway?
(a) Right ventricle → Pulmonary aorta → Tissues Pulmonary veins → Left auricle
(b) Right auricle → Left ventricle → Aorta → Tissues → Veins → Right auricle
(c) Left auricle → Left ventricle → Pulmonary aorta + Tissues → Right auricle
(d) Left auricle → Left ventricle → Pulmonary aorta → Arteries → Tissues → Veins → Right atrium
Answer:
(d) Left auricle → Left ventricle → Pulmonary aorta → Arteries → Tissues → Veins → Right atrium

Question 16.
Open circulatory system is present in
I. Arthropods
II. Annelids
III. Chordates
IV. Molluscs
(a) III only
(b) III and II
(c) I and IV
(d) IV only
Answer:
(c) I and IV

Question 17.
The artery, which supplies blood to the pericardium is
(a) brachial artery
(b) pulmonary vein
(c) vertebral artery
(d) coronary artery
Answer:
(d) coronary artery

Question 18.
In diastole, heart is filled by
(a) mixed blood
(b) venous blood
(c) oxygenated blood
(d) deoxygenated blood
Answer:
(d) deoxygenated blood

Question 19.
You are required to draw blood from patient and to Keep it in a test tube for analysis of blood corpuscles and plasma. You are also provided with the following four types of test tubes. Which of them will you not use for the purpose?
(a) Test tube containing calcium bicarbonate
(b) Chilled test tube
(c) Test tube containing heparin
(d) Test tube containing sodium oxalate
Answer:
(c) Test tube containing heparin