Question 33
Nutrient CyclingIn spite of the removal of carbondioxide from the atmosphere, its amount remains more or less constant because
- A.it is produced by green plants during photosynthesis
- B.it is produced during respiration by animals
- C.it is absorbed in ocean water
- D.green plants release it during the day.
Show the answer and explanation
Answer: B (it is produced during respiration by animals)
Explanation
Respiration by animals (and plants and decomposers) puts carbon dioxide back into the air, balancing what photosynthesis removes.