Question

8. Which of these helps to pull in oxygen-rich air into the lungs?
a. Expansion of the diaphragm
b. Relaxation of the diaphragm
C. Up and down movement of the ribs d. Tracheal tubes
9. Why do farmers plough the soil?
a. To increase root respiration b. To decrease root respiration
c. To increase respiration through stomata
d. To decrease respiration through stomata
10. Which of these is true about anaerobic respiration?
a. It is carried out in humans for a short time.
b. It takes place in our muscle cells when we are doing heavy work or exercise
running fast, etc.
c. It is common in many micro-organisms.
d. All of these​

Answer 1

Answer:

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• Q-9)To increase root respiration
• Q-10)It takes place in our muscle cells when we are doing heavy work or exercise
• Q-8)Expansion of the diaphragm

$\mathbb\blue{hope :\ it :\ helps }$

Answer 2

Answer:

8.a

9.a

10.d

Hope it helps ! : )