Biology
NULL
Medium
Question
At which times there is no net gaseous exchange between leaves and the atmosphere.
A
Day time.
B
Night time.
C
Dawn & Dusk.
✓ Official correct answer
D
Mid night.
Community credibility
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A
Day time.
No member explanations yet for this option.
B
Night time.
No member explanations yet for this option.
C
Dawn & Dusk.
No member explanations yet for this option.
D
Mid night.
No member explanations yet for this option.
Explanation
At dawn and dusk, light intensity often crosses the threshold where the rate of photosynthesis equals the rate of respiration, resulting in no net exchange of gases between leaves and the atmosphere.