Which of the following statements explains how CAM plants have evolved to cope with the dangers of excessive water loss in very hot and dry regions like deserts?
A) They are more efficient at water uptake than are C3 and C4 plants.
B) They have special adaptations that cool them off in very hot and dry weather.
C) They close their stomata at night and open them at daybreak to conserve water.
D) They open their stomata at night and close them at daybreak to conserve water.

Question

Quizplus · Accepted Answer

CAM (Crassulacean Acid Metabolism) plants have evolved to conserve water by opening their stomata at night when the air is cooler and more humid, allowing them to take in carbon dioxide for photosynthesis without losing excess water through the stomata. During the day, they close their stomata to conserve the CO2 stored during the night and prevent water loss. This adaptation allows them to survive in very hot and dry regions like deserts.

Which of the Following Statements Explains How CAM Plants Have