Question

fill in the blank question plants allow carbon dioxide to enter the leaves only at night, when the plants fix carbon dioxide into organic compounds. during the day, carbon dioxide is released from these compounds and enters the calvin cycle.

Explanation:

Plants take in carbon - dioxide through stomata. In CAM (Crassulacean Acid Metabolism) plants, carbon - dioxide is taken in at night and stored as organic acids. During the day, these organic acids release carbon - dioxide which enters the Calvin cycle.

Answer:

CAM