Reviewing Std 6 Basic Science Notes Pdf English Medium and Kerala Syllabus Class 6 Basic Science Chapter 6 Tiny Chambers of Life Question Answer SCERT Solutions Notes Pdf can uncover gaps in understanding.
Class 6 Basic Science Chapter 6 Tiny Chambers of Life Question Answer Notes
Basic Science Class 6 Chapter 6 Question Answer Notes Tiny Chambers of Life
Tiny Chambers of Life Class 6 Questions and Answers Notes
Let’s Assess
Question 1.
Some statements related to cells are given
A. All cells have cell wall.
B. All cells have cell membrane.
C. All cells have chloroplast.
D. All cells have cytoplasm.
Answer:
A, and C
Question 2.
Read the given statement. ‘Plant body is made up of cells. Animal body is made up of cells.’ What conclusion can be drawn from these statements?
- There is no diversity among the cells of living organisms.
- Cells are the building blocks of all things.
- Cells are the building blocks of all living things.
- Organ systems in animal body and plant body are the same.
Answer:
Cells are the building blocks of all living things
Question 3.
Arrange the following in sequential order.
Cells, Organisms, Tissues, Organ system, Organ
Answer:
Cells → Tissues → Organs → Organ systems → Organism
Question 4.
Unicellular organisms have smaller cells, and multicellular organisms have larger cells. What is your response to this statement?
Answer:
This statement is not true. That is, the idea that unicellular organisms h^ve small cells and multicellular organisms have large cells is wrong. The size of an organism is determined not by the size of the cell, but by the number of cells. It is not necessary that unicellular organisms have small cells.
Basic Science Class 6 Chapter 6 Question Answer Kerala Syllabus
Question 1.
We cannot see cells with our naked eye. What could be the reason?
Answer:
Our eyes cannot see objects smaller than a certain point. Most cells are much smaller than that. With our naked eyes, we can only clearly see objects about 0.1 millimetres, or 100 micrometres, in size. Since most cells are smaller than this, we cannot see them even though they are right in front of our eyes.
Question 2.
Observe the given picture and record the parts of the microscope in your Science Diary.
Answer:
- Eyepiece
- Objective lens
- Adjustment Knobs
- Stage
- Stage clips
- Condenser
- Mirror
Question 3.
With the help of the picture, write down what parts the cells in the cheek (animal cell) have.
Answer:
- Cell membrane
- Cytoplasm
- Nucleus
Question 4.
Aren’t plants also living? Are they also made of cells like this? What is your guess?
Answer:
Cells are the building blocks of life. Plants are also made up of these cells.
Question 5.
The organisms you observed through the microscope are unicellular organisms. Observe the picture and write their names.
Answer:
- Amoeba
- Paramecium
- Euglena
Question 6.
Which are the life processes carried out in multicellular organisms?
Answer:
- Movement
- Nutrition
- Respiration
- Digestion
- Excretion
- Reproduction
Question 7.
Do unicellular organisms also have all the same life processes as in multicellular organisms? Discuss.
Answer:
Life processes are the sum of all the basic functions that organisms need to survive and grow. All of these functions occur in both unicellular and multicellular organisms, but the way they are performed differs. In unicellular organisms, all life processes are performed by a single cell.
Question 8.
Complete the given table by understanding the characteristics of unicellular and multicellular organisms.
Answer:
| Unicellular organisms | Multicellular organisms. |
| Possess a single cell | The body is made up of many cells |
| All life activities are done by a single cell | Each life function has specific cells and organs. |
| They have a simple body structure. | They have a complex body structure.. |
| E.g., Amoeba, Paramecium, Yeast, Bacteria. | E.g., Elumans, animals, plants (trees), insects. |
Question 9.
Observe the pictures given below. What do you see? What are their peculiarities? Write it in your Science Diary.
Answer:
Unicellular organism – Paramecium (only one cell)
Special features: This single cell performs all the vital functions such as respiration, nutrition, excretion, reproduction, and movement. They do not need the help of another to survive on their own. They often reproduce by dividing the cell into two (Binary Fission).
Cells in multicellular organisms – cheek cells, onion cells
Special features: The body is made up of billions of cells. Cells that do the same job are grouped together to form tissues, and tissues are grouped together to form organs. Each cell has its own specific job (for example: muscle cells help in movement). Since each cell does a specific job, the work is done accurately and efficiently. It cannot exist alone. It can only function by cooperating with other cells in the body. Due to the cooperation between cells, they are able to have more complex body structures and functions.
Question 10.
Identify and list the different parts of a cell with the help of the picture.
Answer:
- Cell membrane
- Cytoplasm
- Nucleus
- Endoplasmic Reticulum
- Mitochondrion
- Ribosome
- Vacuole
Question 11.
Analyse the table and discuss the role of each part of the cell based on the given indicators. Record it in your Science Diary.
(a) What is the function of cell membrane?
Answer:
It covers and protects the cell.
(b) Which is the part that controls the entire cell?
Answer:
Nucleus
(c) Which cell organelle works as the powerhouse of the cell?
Answer:
Mitochondrion
(d) Which organelle acts as the pathway within the cell?
Answer:
Endoplasmic reticulum
(e) What is the difference between the function of a vacuole and that of a ribosome?
Answer:
The function of the vacuole is to store water, salts, and waste products inside the cell. However, the ribosome is the cell organelle that functions as the centre of protein production.
Question 12.
Observe the picture and understand the parts of a plant cell.
Answer:
- Cell wall
- Cell membrane
- Cytoplasm
- Nucleus
- Endoplasmic Reticulum
- Mitochondrion
- Ribosome
- Vacuole
- Chloroplast
Question 13.
How do plant cells differ from animal cells? Do you see any part in plant cells that is different from animal cells? Analyse the figure and write.
Answer:
- Chloroplast
- Cell wall
- Vacuole (Difference in size)
The list of plant cell parts that differ from animal cells and their functions are given below in the table.
| Parts of cell | Function |
| Cell wall | Protects the cell |
| Chloroplast | Helps in photosynthesis |
| The nucleus is an important cell organelle inside the cell. Vacuole, ribosome, endoplasmic reticulum, mitochondrion, chloroplast, etc, seen in the cytoplasm are other cell organelles. |
Question 14.
Tabulate the similarities and differences between the animal cell and the plant cell.
Answer:
| Similarities between a plant cell and an animal cell | Differences between a plant cell and an animal cell |
|
|
Question 15.
Isn’t the body made up of cells? If so, do we have the same type of cells in all parts of our body?
Answer:
No, not all parts of our body have the same type of cells. Although the body is made up of billions of cells, cells vary greatly in shape and structure to perform the specific functions of each part. This phenomenon is called cell differentiation.
Question 16.
Observe the given picture. What do you see?
Answer:
- Lungs
- Trachea
- Nostrils
Question 17.
Are the lungs, trachea, and nostrils organs?
Answer:
Yes, different organs function in coordination; they form an organ system. The lung is an organ. Similarly, nostrils and trachea are also organs. Together, they form the respiratory system.
| The circulatory system is another organ system in our body. An organism is made up of different organ systems, like this. |
Question 18.
Complete the flowchart and record it in the Science Diary.
The journey of a cell to an organism
Answer:
Cells → Tissues → Organs → Organ systems → Organism
Class 6 Basic Science Chapter 6 Question Answer Extended Activities
Question 1.
Prepare slides of plant parts and observe them under microscope.
Answer:
Do ityourself
Question 2.
Collect information related to Robert Hooke and history of cells from the library or internet. Prepare notes and present them in the class.
Ans:
Robert Hooke – Discovery of the Cell:
Robert Hooke (1635-1703) was an English scientist, architect, and physicist. He is remembered in the history of science, especially for his discovery of the basic unit of life, the cell.
Major Contributions:
- Discovery of the Cell: In 1665, he observed thin sections of cork using a microscope he designed.
- The name ‘cell’: Within this core, he saw many small, empty, honeycomb-like chambers. He used the Latin word ‘cellulae’, meaning ‘small rooms’, for these chambers. This is what later became known as ‘cell’.
- “Micrographia”: A book published in 1665 by Hooke explaining his observations. It is the first book to include drawings of microscopic organisms and objects.
Cell History:
The study of cells developed further about 150 years after the discovery of cells. It was in the 19th century that the idea that cells are the basis of all living things was confirmed. This is the Cell Theory.
Tiny Chambers of Life Notes Pdf
Tiny Chambers of Life Class 6 Notes Kerala Syllabus
- Our body is built up of basic units called cells. They are the basic units of all living things.
- The human body is made up of millions of cells.
- Cells are very tiny. They cannot be seen using a hand lens.
- We use a microscope to observe things that cannot be seen by naked eyes.
- Unicellular organisms are organisms that have only one cell.
- An organism whose body is made up of more than one cell is a multicellular organism. We can see multicellular organisms with our naked eyes as they have numerous cells.
- There are specific members within the cell responsible for performing each function. These are called cell organelles. Cell organelles found within the cells are also different. Their functions are also different.
- The nucleus is an important cell organelle inside the cell. Vacuole, ribosome, endoplasmic reticulum, mitochondrion, chloroplast, etc, seen in the cytoplasm are other cell organelles.
- We grow not because of the increase in the size of cells in our body, but because of the increase in their number.
- There are about two hundred different types of cells, such as nerve cells, blood cells, and muscle cells. They all have different functions. They also vary in shape.
- Cells that are similar in shape and perform the same function are collectively called tissues.
- Skin is the part that covers and protects the body of animals. It is a group of cells. These are the epithelial tissues.
- Cells combine to form tissues. Many tissues combine to form various organs.
- Different organs function in coordination; they form an organ system.
Cells → Tissues → Organs → Organ systems → Organism
Introduction
A cell is defined as the basic structural and functional unit of all known living organisms. Just as bricks are the basic units of a building, cells are the building blocks of every living thing—from the smallest bacteria to a massive whale, and every plant and animal in between. The study of cells is known as Cell Biology or Cytology.
Cells are incredible, self-contained units capable of carrying out all the essential processes necessary for survival, including: Metabolism, Reproduction, Response to Stimuli, etc.
While cells come in countless shapes and sizes (like long nerve cells or disc-shaped red blood cells), they share three primary, universal components: Cell Membrane, Cytoplasm, and Organelles. There are many types of cells, including nerve cells, muscle cells, skin cells, and blood cells, each with specialised functions.
A cluster of cells can form a tissue, such as epithelial tissue, where the cells are tightly packed together to form a protective layer. In this chapter, we are going to study some topics regarding cells, the microscope and its various parts, observation of different types of cells, the difference between plant and animal cells, the size and number of cells, diversity among cells, cell clusters, organ systems in the human body and the journey of a cell to an organism.
CELLS
- Our body is built up of basic units called cells.
- They are the basic units of all living things.
- The human body is made up of millions of cells.
- There are many small and large organisms around us. Their bodies are also made up of cells.
MICROSCOPE
- Cells are very tiny.
- They cannot be seen using a hand lens.
- We use a microscope to observe things that cannot be seen by naked eyes.
Let’s Observe Cells
- Cells can easily be taken from the inner part of the cheek.
- Materials needed to do an experiment to see how it works when taking cheek cells:
Toothpick, slide, methylene blue stain, cover, glass. - Procedure: Rinse the mouth thoroughly with clean water. Gently scrape the inside of the cheek using a toothpick. Cheek cells get attached to the tip of the toothpick. Place these cheek cells at the centre of the slide.
- Add a drop of methylene blue stain to it. Place a cover glass over it. Place the slide on the microscope and observe.
Let’s Observe The Cells In The Onion: Activity
- Materials Required: Onion, blade, forceps, needle, watch glass, safranine stain, glycerine, pure water, cover glass, tissue paper, slide
- Procedure: Take a thin layer from a cleaned onion using forceps.
- Cut it into small pieces and place them in a watch glass containing a dilute safranine stain. After some time, take two or three pieces of stained onion from the watch glass and place it in another watch glass containing pure water. Take one piece from pure water and place it in glycerine on the slide. Place a cover glass over this with the help of a needle. Wipe off excess glycerine with tissue paper. Observe the prepared slide under the microscope.
Wonder World In A Drop Of Water – Activity
- Aim: Observe a drop of water through a microscope.
- Materials Required: Microscope, cover glass, water boiled with hay and cooled, water collected from pond/paddy fields, spoon.
- Procedure: Pour some water collected from the pond/paddy field into the water boiled with hay.
Keep it for four or five days. Take a drop of water from this water sample on a slide. Place a cover glass over it and observe it under the microscope
Observation:
Conclusion: Microorganisms like the one in the picture can be seen through a microscope. Although they are microorganisms, their bodies are also made up of cells.
Robert Hooke
The cell was discovered by Robert Hooke in 165. He observed a small portion of cork taken from an oak tree through a microscope designed by him. He found numerous areas like tiny chambers. He called it ‘Celia.’ The Latin word Cella’ means a small room. Now we call it ‘cell.
UNICELLULAR AND MULTICELLULAR ORGANISMS
Unicellular Organisms
- Unicellular organisms are organisms that have only one cell.
- As the number of cells is.less, we cannot see them with our naked eyes.
Multicellular Organisms
- An organism whose body is made up of more than one cell is a multicellular organism.
- We can see multicellular organisms with our naked eyes as they have numerous cells.
Examples of multicellular organisms include:
- Tapeworm
- Leech
- Cockroach
- Starfish
- Fish
- Frog
- Eagle
- Gerden lizard
- Elephant
INTO THE CELL
Cell Organelles
- There are specific members within the cell responsible for perfonning each function. These are called cell organelles.
- Cell organelles found within the cells are also different. Their functions are also different.
Parts of Cell And Their Functions
The different parts of the animal cell and their functions are given in the table.
| Parts of cell | Function |
| Cell membrane | Covers the cell |
| Cytoplasm | Holds the cell parts inside the cell, except nucleus |
| Nucleus | Controls cellular activities. |
| Vacuole | Stores water, salt and excretory products |
| Ribosome | Synthesises protein. |
| Endoplasmic reticulum | Acts as intracellular pathway |
| Mitochondrion | Synthesises energy |
Plant Cell
Small And Large
We grow not because of the increase in the size of cells in our body, but because of the increase in their number.
The difference in size between organisms is also due to differences in the number of cells.
DIVERSITY AMONG CELLS
- The human body is made up of different types of cells.
- There are about two hundred different types of cells, such as nerve cells, blood cells, and muscle cells.
CLUSTERS OF CELLS
Cells that are similar in shape and perform the same function are collectively called tissues.
Skin is the part that covers and protects the body of animals. It is a group of cells. These are the epithelial tissues.
The body has different types of tissues, like nervous tissues and muscular tissues.
Nervous tissues are formed by the combination of nerve cells, and muscular tissues are formed by the combination of muscle cells.
Various such tissues are also found in plants.
Cells combine to form tissues. Many tissues combine to form various organs. For example: liver, heart.
