Question

Assertion (A) In the day time, CO₂ generated during respiration is used up for photosynthesis.

Reason (R) There is no CO₂ release during day. 

A. Both A and R are true and R is the correct explanation of A. 

B. Both A and R are true, but R is not the correct explanation of A 

C. A is true, but R is false 

D. A is false, but R is false

Answer 1

In respiration, O₂ is taken in and CO₂ is released while in photosynthesis, CO₂ is used up and O₂ is released. Both photosynthesis and respiration occurs in plant during daytime. But the rate of photosynthesis is much more than rate of respiration. Thus there is no net release of CO₂.