CBSE Class 8 Science The Invisible Living World: Beyond Our Naked Eye (Class 8 NCERT New) Quiz 2

1. Fill in the blank: Robert Hooke looked at a thin slice of cork and saw it was made of many small, empty spaces. He called each small space a _______.

A cell B atom C molecule D fiber

2. Who is known as the Father of Microbiology?

A Antonie van Leeuwenhoek B Louis Pasteur C Robert Koch D Edward Jenner

3. Robert Hooke was the first person to clearly see and describe living things like bacteria and blood cells.

A True B False

4. What is the basic unit of life according to the passage?

A Cell B Atom C Tissue D Organ

5. Observe the slide under a microscope (A simple foldable paper microscope will suffice). Compare it with Fig. 2.3c. Which of the following similarities can be found in Fig. 2.3c and Fig. 2.3d?

A Both figures show similar cell shapes and arrangements. B Both figures display different cell types. C Fig. 2.3c shows more cells than Fig. 2.3d. D Fig. 2.3d has a different color than Fig. 2.3c.

6. What do you find that all plants are made up of?

A All plants are made up of cells. B All plants are made up of rocks. C All plants are made up of plastic. D All plants are made up of metal.

7. What do you think the body of an animal is made of?

A The body of an animal is made up of cells. B The body of an animal is made up of rocks. C The body of an animal is made up of plastic. D The body of an animal is made up of metal.

8. Which stain is used to give a pinkish colour to the onion peel cells for better observation under the microscope?

A Safranin (red-coloured stain) is used. B Methylene blue is used. C Crystal violet is used. D Iodine solution is used.

9. Identify the parts labeled in Fig. 2.3c.

A Cell wall, Cell membrane, Nucleus, Cytoplasm are the parts labeled in Fig. 2.3c. B Cell wall, Cell membrane, Mitochondria, Cytoplasm are the parts labeled in Fig. 2.3c. C Cell wall, Cell membrane, Chloroplast, Cytoplasm are the parts labeled in Fig. 2.3c. D Cell wall, Cell membrane, Ribosome, Cytoplasm are the parts labeled in Fig. 2.3c.

10. The similarities and differences observed between the cells of onion peel in Activity 2.2 and human cheek cells in Activity 2.3 are:

A Both have a cell membrane, but only onion peel cells have a cell wall. B Both have a cell wall, but only human cheek cells have a nucleus. C Both lack a nucleus, but only onion peel cells have a cell membrane. D Both have a cell wall and a nucleus.