CAM plants keep stomata closed in the daytime, thus reducing loss of water. They can do this because they ________.
A) fix CO2 into organic acids during the night
B) fix CO2 into sugars in the bundle-sheath cells
C) fix CO2 into pyruvate in the mesophyll cells
D) use the enzyme phosphofructokinase, which outcompetes rubisco for CO2
E) use photosystem I and photosystem II at night

Question

Quizplus · Accepted Answer

CAM plants fix CO2 into organic acids during the night and store them in the cell vacuoles. During the day, the stomata remain closed to reduce water loss, and the CO2 from the organic acids is released and used in the Calvin cycle to produce sugars.

CAM Plants Keep Stomata Closed in the Daytime, Thus Reducing