Question

Plants do not need to obtain much oxygen from the atmosphere, because ___.

• A. Plants do not use oxygen for respiration.
• B. Plants carry out cellular respiration using carbon dioxide.
• C. Plants produce oxygen during photosynthesis and utilize the oxygen produced for respiration.
• D. Plant metabolism is low

Answer 1

The correct option is C

Plants produce oxygen during photosynthesis and utilize the oxygen produced for respiration.

Plants are active photosynthesizers, that is they take up carbon dioxide from the atmosphere and using the energy from sunlight and water they convert it into carbohydrate molecule. During this process, plants produce oxygen. They utilize the oxygen produced for respiration. Since they need comparatively lesser oxygen than what they produce, they do not need to take up much oxygen from the atmosphere.