CBSE Class 8 Science The Invisible Living World: Beyond Our Naked Eye (Class 8 NCERT New) Quiz 16

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

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1. What is the basic unit of life in all living organisms?

A Cell B Tissue C Organ D Organ system

2. Which of the following correctly shows the levels of organisation in the body of a living organism, from simplest to most complex?

A Organ → Tissue → Cell → Organ system → Organism B Cell → Tissue → Organ → Organ system → Organism C Tissue → Cell → Organ system → Organ → Organism D Organism → Organ system → Organ → Tissue → Cell

3. What is the main function of nerve cells (neurons) in the body?

A To produce digestive juices B To carry messages in the body C To help carry water throughout the plant D To churn food in the stomach

4. Why are muscle cells in the stomach thin, flexible, and spindle-shaped?

A To help carry water B To form a protective lining C To contract and relax, pushing food down to the stomach D To produce digestive juices

5. What term is used for living beings made up of many cells?

A Unicellular organisms B Multicellular organisms C Organ systems D Tissues

6. How do different types of cells in the stomach help in digestion?

A By carrying messages B By forming long tubes C By churning food and producing digestive juices D By protecting the inner cheek

7. Why is the study of levels of organisation important in biology?

A It helps us understand how cells divide B It helps us understand how simple building blocks come together to form complex living beings C It helps us know the shape of cells D It helps us identify plant cells

8. Which is the largest known cell in the living world?

A The yolk of an ostrich egg B A human red blood cell C The nucleus of a plant cell D The cell of a bacterium

9. What are microorganisms?

A Organisms that can be seen with the naked eye B Organisms made up of many large cells C Organisms made up of just one or very few cells, not visible to the naked eye D Only plants and animals

10. Which of the following is an example of a unicellular microorganism?

A Algae B Amoeba C Fungi D Human skin cell

Practice more on The Invisible Living World: Beyond Our Naked Eye (Class 8 NCERT New)

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