Online MCQs Test – Gaseous Exchange – Biology 10th

1. Plants do the exchange of gases through:

2. Trachea in the center of the thorax bifurcates into two smaller ducts, called:

3. Each bronchiole is a very thin tube that opens into:

4. These are microscopic openings present in the epidermis of leaves.

5. Ribs are attached with:

6. The opening of larynx has a lid like cover called:

7. The amount of molecular oxygen present in water is about:

8. The total surface area of the respiratory surface in human is about.

9. Each lung is soft, spongy and:

10. The biological functions which perform gaseous exchange:

11. The respiratory surface of human is:

12. In humans, the process of respiration involves:

13. The internal opening of nasal sacs opens into a long tube called:

14. It contains vocal cords to produce sound.

15. It is an allergic response to pollens, dust, smoke, fur, feathers and several other substances.

16. Carbon dioxide is taken in the process of:

17. Increase in rate of breathing is due to the following:

18. Stomata are present in:

19. Inspiration involves:

20. Each lung is made up of millions of: