Question

If a plant is releasing carbon dioxide and taking in oxygen during the day, does it mean that there is no photosynthesis occurring? Justify your answer.

Answer 1

No, it does not mean that photosynthesis is not taking place. During the day, carbon dioxide released by plants during respiration is used up for photosynthesis, and some of the oxygen released during photosynthesis is used for respiration by the plants. Release of oxygen is a sign that photosynthesis is occurring in plant.