1.
Which gas is absorbed and which is released by plants during respiration?
A
O₂ absorbed, CO₂ released
B
CO₂ absorbed, O₂ released
C
N₂ absorbed, O₂ released
D
O₂ absorbed, N₂ released
Answer and explanation
Correct Answer: A — O₂ absorbed, CO₂ released
During respiration, plants (like animals) absorb O₂ and release CO₂. This is the reverse of photosynthesis.