Question

“All plants give out oxygen during the day and carbon dioxide during the night”. Do you agree with this statement? Give a reason.

Answer 1

I agree with the given statement.

Reason:

Respiration in plants occurs both during the day and at night. Photosynthesis ceases at night, and the predominant exchange activity is the removal of CO₂. Throughout the day, the rate of photosynthesis exceeds that of respiration; hence, the CO₂ produced during respiration is consumed by photosynthesis, resulting in no net CO₂ release. Therefore, oxygen release constitutes the primary occurrence during daylight hours.