Question

What factors affect the rate of respiration?

• A. Temperature
• B. Carbon dioxide
• C. Both A and B
• D. Soil

Answer 1

Answer: (C)

Both A and B

Temperature- At a very high temperature, the rate of respiration decreases with time and at very low temperature, the respiration rate is insignificant. Optimum temperature for respiration is 20 - 30${}^o$ C.

Carbon dioxide concentration - Increase in CO${}_2$ concentration and absence of O${}_2$ adversely affects the rate of aerobic respiration.

Light- Light controls respiration by raising the temperature of an organism.

Water- The respiratory rate increases with the increase in water content of the respiring organism.

Therefore, the correct answer is option C.