Caskets of Life Notes Questions and Answers Class 6 Basic Science Chapter 1 Kerala Syllabus

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Basic Science Class 6 Chapter 1 Caskets of Life Question Answer Notes

Basic Science Class 6 Chapter 1 Question Answer Notes Caskets of Life

Caskets of Life Class 6 Notes Questions and Answers

Let Us Assess

Question 1.
Do you agree with the following statements? Explain.
a) Hand lens, microscope etc., may be used for observing cells.
b) There are organisms on the earth with only one cell.
c) The difference in the size of the organisms is due to the difference in the size of cells.
d) All cells in an organism are of the same kind.
Answer:
a) Handlens is not used for observing cells, because a hand lens does not magnify objects very much. So we can’t see cells with a hand lens. Microscope is used for observing cells, because most cells are too small to be seen by the naked eye microscope uses lenses to produce a magnified image of tiny objects, which are not visible to naked eye.

b) Yes, there are organisms on the earth with only one cell. They are called unicellular organisms. Amoeba, paramecium, euglena, etc are unicellular organisms.

c) No, the difference in the size of the organism is due to the number of cells in the body. Different cells have different size. When a body grows, the size of each type of cell remains constant, but its number increases.

d) No, all cells in an organism are of different kind. Each cells have a specific function. An organism may consist of one single cell (Unicellular) or many different numbers and types of cells (multicellular).

Question 2.
Given below in the table are a few details prepared by a child comparing animal ell and plant cell. Complete the table by filling parts of the cell.

Answer:

Parts of the cell	Plant cell	Animal cell
Nucleus	Yes	Yes
Vacule	Large	Small
Cell wall	Yes	No
Cytoplasm	Yes	Yes
Chloroplast	Yes	No

QUESTIONS AND ANSWERS

Question 1.
Help Aruni to write down the organisms given below in the ascending order of their sizes Butterfly, Cockroach, Honey bee, Ant, Dragon fly.
Answer:
Ant, Honeybee, Dragon fly, Cockroach, Butterfly

Question 2
Which is the smallest organism we can see with our naked eye?
Answer:
Paramecium (0.5mm)

Question 3.
Is ant the smallest creature on land?
Answer:
No

MICROSCOPE

Question 1.
Babu was observing an ant using a hand lens.
a) Can you see a creature smaller than ant, using a hand lens?
Answer:
Yes, we can observe small flies, flour bugs etc. use a hand lens,

b) Can you see microorganisms using a hand lens?
Answer:
No

c) Which instrument is used to observe microorganisms like bacteria and viruses?
Answer:
Microscope.

d) What is a microscope write its uses?
Answer:
Microorganisms that cannot be seen by naked eye can observed through an instrument called microscope.

• Microscope can be used to observe microorganisms.
• Used to magnify small objects
• Used in educational field and medical field

Question 2
Instrument used to observe microorganisms like bacteria and viruses called………..
Answer:
Microscope

Question 3
Write the use of a hand lens.
Answer:
Used to magnify objects.

Question 4.
What type of lens is hand lens?
Answer:
Convex lens.

How small………!

Question 1.
Look at the picture given below and answer the following

a) Name the microorganism.
b) Could you observe this organism with your naked eye.
c) How can we see microorganisms?
Answer:
a) Amoeba
b) No
c) We can see with the help of a microscope.

Question 2.
Identify the given
microorganism

Answer:
Euglena

Question 3
Can you observe a microorganism like Amoeba with your naked eye?
Answer:
No

Question 4
What are microorganisms?
Answer:
Organisms that cannot be seen by the naked eye are microorganisms

Question 5.
Rani going to do an experiment to observe tiny organisms that present in hay soaked water. What are the materials she required for this experiment?
Answer:
Microscope, Slide, Cover glass, hay-soaked water.

Question 6
What is bacteria?
Answer:
A large group of single-cell microorganisms are called bacteria.

Question 7.
What is a Virus?
Answer:
A Virus is an infectious microbe

Question 8.
Name any two microorganisms
Answer:
Bacteria, Virus

Question 9.
Name the following microorganisms.

Answer:
a) Amoeba
b) Euglena
c) EuglenaParameciam

Question 10.
Name any three microorganisms that cause diseases?
Answer:
Bacteria, Viruses, Fungi

BASIS OF LIFE

Question 1.
What is a cell?
Answer:
Small units of body are called cells.

Question 2.
Explain unicellular organism with one example?
Answer:
Organisms with only one cell are called unicellular organisms
eg: Amoeba.

Question 3.
Explain multicellular organisms with example?
Auswer:
Organisms with more than one cell in their body are called multicellular organisms. eg: Animals

Question 4.
Classify the following into unicellular and multicellular organisms Euglena, Cat, Amoeba, Mango tree, bacteria, Elephant. Answer:
Unicellular organisms: Euglena, Amoeba, Bacteria
Multicellular organisms: Cat, Elephant, Mango tree.

Question 5.
Ramu observed Amoeba by using a microscope.
Does Amoeba is a multicellular organism? Why?
Answer:
No, Amoeba is a unicellular organism.
Because Amoeba contain only one cell in its body.
Organisms with only one cell in their body are called unicellular organisms.

Question 6.
Why animals are called multicellular organisms?
Answer:
Animals are multicellular organisms, because their body have more than one cell. The organisms contain more than one cell in their body are called multicellular organisms.

Question 7.
What are the materials required to observe cheek cells?
Answer:
Microscope, slide, pure water, Methylene Ans Cheek cell of an adult and a child will be of blue stain, two new tooth brushes and cover glass.

Question 8.
Teacher asked Geetha to observe her cheek cells using a microsope. How can she collect her cheek cells? What are the materials required to observe cheek cells? How can she do this experiment?
Answer:
Wash the mouth thoroughly with clean water. scrape the internal surface of the cheek using a new toothbrush. Microscope, Slide, pure water, methylene blue stain, two new tooth brushes and cover glass. Place the collected cheek scrape in the drop of water on the slide. spread this and add a drop of stain. cover it with the cover glass and observe the slide through the microscope.

Question 9.
Name the cells given in the picture.

Answer:
Cheek Cells

Question 10.
Cheek cells of a child and adult given below. Write down your findings.

Answer:
Cheek cell of an adult and a child will be of the same size. Size of the cells remain the same. When a child grows in to an adult the number of cells in his body increases

Question 11.
The number of cells in the human body…………
Answer:
Millions

Question 12.
Why do the organisms differ in their size
Answer:
Different cells do different things, they have different shapes and sizes. The size of an animal depends on the size and number of cells it contains.

Question 13.
How does the body grow without bringing about any change in the size of the cells?
Answer:
As the body grows the number of cells also increases. Different cells do different things, they have different shapes and sizes. The size of an animal depends on the size and number of cells its contains.

Different types of cells

There are different types of cells in the human body and in multicellular organisms

Question 1.
Write any two cells of human body.
Answer:
Muscle Cell, Neuron

Question 2.
Identify the cells given below and write them down.

Answer:
a) Blood cell
b) Cheek cell

Question 3.
Is the shape of all the cells in a human body the same?
Answer:
No

Question 4.
What is the function of a muscle cell?
Answer:
Muscle cells are specialized to stabilize or move parts of the body.

Question 5
What are neurons?
Answer:
Neurons are a type of cells. Neurons are information messengers. They transmit information between different areas of brain and between the brain and the rest of nervous system.

Question 6.
Teacher asked Meera to write the functions of red blood cells and cheek cells. Help Meera.
Answer:
The function of cheek cells to providenutrition to the cheeks, the function of red blood cells to supply oxygen to all body parts and remove carbondioxide from them.

Question 7.
Sabitha observing red blood cells using a microscope she records her findings after that she observed her cheek cells.
a) Does both cells are same?
b) can you say the shape of both cells
Answer:
a) No, both cells are different
b) cheek cells have an irregular shape Red blood cells have biconcave shape

Question 8.
How muscle cells different from a cheek cell?
Answer:
Muscle cells are specialized to stablize or move parts of the body.
Cheek cells provide nutrition to the cheek cells

Inside the cell

Question 1.
Draw an animal cell and mark it.
Answer:

Question 2.
Nucleus of a cell is located …………
Answer:
Inside and centre of a cell.

Question 3.
What is a cytoplasm?
Answer:
The matix filled inside the cell membrane is called cytoplasm.

Question 4.
When you observe an animal cell, what are the main parts you can see?
Answer:
Nucleus, cytoplasm and cell membrane.

Question 5.
Draw the figures of white blood cells and cheek cell.
Answer:

Question 6
Explain Nucleus, Cytoplasm, Cell membrane.
Answer:
Nucleus: It is the centre of the Cell
Cytoplasm: The matrix filled inside the cell membrane.
Cell Membrane: It is the covering of the cell.

Question 7.
Name the animal cells.

Answer:
Cheek cells, white blood cell, Muscle cell, Neuron.

Question 8
Draw figures of a cheek cell and label.
Answer:

Plant cell

Question 1.
Draw the cells of onion peel.
Answer:

Question 2.
How can you prepare a slide to observe cells of an onion peel?
Answer:
Remove the dry outer layers of onion. Then peel off the thin layer from the fleshy part. Keep this in water in a watch glass. After staining it, place a small portion on a slide by using a brush. cover it with cover glass.

Question 3.
Name the stain used for prepairing slide of an onion peel.
Answer:
Saffranin

Question 4.
What are guard cells?
Answer:
Guard cells are kidney shaped cells that surrounds the stomata. They control opening and closing of stomata.

Question 5.
Are guard cells present in animal cells?
Answer:
No

Question 6.
Is guard cell is a plant cell?
Answer:
Yes

Question 7
Does the cell in the leaf and Onion peel are same?
Answer:
Cells of leaf are not uniform in structure as seen in onion peel. They all are of different shapes and sizes. Leaf cells have Chlorophyil

Question 8.
Structure of a cell is given below. What type of cell is this? Label it correctly.

Answer:
It is a plant cell

Question 9.
Teacher draws picture of plant cell and animal cell on the board and asked to write the similarities between them. Does both
cells are similar?
Answer:
No both animal and plant cells are different. But both have similar parts. They are nucleus, Cytoplasm, Vacuole and cell membrane.

Question 10.
Write down the difference between a plant cell and animal cell.
Answer:

Plant Cell	Animal Cell
a) Cell wall present	a) Cell wall is absent
b) Chloroplast is present	b) No Chloroplast
c) Regular or rectangular shape	c) Irregular or round in shape

Question 11.
Check whether true of false
a) Muscle cells are plant cell
b) Vacuole is present only in animal cell
c) Chloroplast is present in plant cell
d) saffranin is a stain
e) There is no cell wall in animal cell
Answer:
a) f, b) F, c) T, d)T, e) T

Question 12.
Are the different parts of a plant made up of similar kind of cells?
Answer:
No. Different parts of plant made up of different types of plant cells.

Question 13.
What are the different types of Plant Cells?
Answer:
Three different types. They are Parenchyma, Collenchyma and Sclerenchyma

Question 14.
Are the different parts of a plant made up of similar kinds of cells? write an activity to prove this.
Answer:
No. different parts of a plant made up of different kinds of cells.
Take a cross section of a tender stem of a plant using a sharp blade. It should be thin and complete place the section on a slide and observe it through a microscope. We can see different plant cells.

Question 15.
Parenchyma is a ……………cell
Answer:
Plant cell

Question 16.
The body of animals and plants are made up of …………?
Answer:
Cells

Question 17.
Does plants and animals have cells of same size and shape?
Answer:
No, plants and animals have cells that differ in shape and size

Question 18.
Check whether true of false
a) Parenchyma is an animal cell
b) Collenchyma is a microorganism
c) Animal cells and plant cells are same
d) There are three types of plant cells
Answer:
a) F, b) F, c) F, d) T

Question 19.
Write any 3 plant cells and animal cells
Answer:
Plant Cells: Parenchyma, Collenchyma, Sclerenchyma
Animal Cells: Cheek Cells, Muscle Cells, blood Cells
The body of animals and plants are made up of cells. These cells that differ in shape and size. Our life sustaining activities take place by the coordination of these cells. Cells are the basic units of life.

EXTRA QUESTION AND ANSWERS

Question 1.
Name the stain used to prepare a slide to observe cheek cells of humans?
Answer:
Methylene blue

Question 2.
On which basis organisms are categorised into unicellular and multicellular organisms?
Answer:
On the basis of number of cells present in the body of organisms.

Question 3.
Animals and plants are ………….. organisms?
Answer:
Multicellular

Question 4.
Are cell walls and cell membranes same?
Answer:
No, cell walls are different from cell membrances.

Question 5.
What is chloroplast?
Answer:
Chloroplast present in plant cell. A Chloroplast is a type of membrane bound organdle that conducts photosynthesis.

Question 6.
An Animal cell contains.
i) Nucleus
ii) Chloroplast
iii) Cell membrane
iv) Cell wall
Choose correct answer?
Answer:
Nucleus and cell Membrane

Question 7.
Amoeba, Paramecium and euglena are unicellular organisms. Why?
Answer:
Amoeba, Paramecium and euglena are organisms with only one cell. So they are called unicellular organisms. Organism with only one cell are called unicellular organisms.

Caskets of Life Class 6 Notes

‘Caskets of Life’ means the ‘Boxes of life’ the very precious boxes of all living organisms. This chapter gives you an idea about the Boxes of Life. Our Universe contains different kinds of Organisms, micro level to macro levels. Micro organisms can be observed only through microscopes whereas macro organism through our naked eye. All these organisms pocess that precious boxes, yes that are ‘cells’. Cells are the very precious boxes of life. The chapter ‘Caskets of Life’ provides you an idea about micro organisms, microscopes, cells, cells of plants and animals, its structure and all physiological activities takes place in plants and animals, like that it also take place in micro organisms too.

The basis of all living organisms are cells. Cells of plants, animals and micro organisms are different. They have different sizes shapes and functions. Cells have some similarities too. Even though their size, shapes are different, there is no life without cells. Unicellular and multicellular organisms are present. The body of a multicellular organisms contains millions of cells in their body. These cells can be observed only through microscopes. The cells of plant and animals are different, but there are some similiarities also. Life sustaining activities takes place by the coordination of these cells.