Which gas is produced during respiration and consumed by photosynthesis?

Which gas is produced during respiration and consumed by photosynthesis?

• A. Oxygen
• B. Water vapor
• C. Carbon dioxide
• D. Nitrogen

Answer: (C)

Carbon dioxide is the gas that links respiration and photosynthesis. In respiration, organisms break down sugars using oxygen, releasing energy and producing carbon dioxide as a waste product. In photosynthesis, plants use carbon dioxide and water, powered by light energy, to build sugars and release oxygen. So carbon dioxide is produced during respiration and consumed by photosynthesis, making it the gas that moves from one process to the other. Oxygen, on the other hand, is produced by photosynthesis and used by respiration, not produced by respiration. Water vapor does appear in both processes but is not the primary gas that directly links them, and nitrogen isn’t involved in these gas exchanges.

Carbon dioxide is the gas that links respiration and photosynthesis. In respiration, organisms break down sugars using oxygen, releasing energy and producing carbon dioxide as a waste product. In photosynthesis, plants use carbon dioxide and water, powered by light energy, to build sugars and release oxygen. So carbon dioxide is produced during respiration and consumed by photosynthesis, making it the gas that moves from one process to the other. Oxygen, on the other hand, is produced by photosynthesis and used by respiration, not produced by respiration. Water vapor does appear in both processes but is not the primary gas that directly links them, and nitrogen isn’t involved in these gas exchanges.