Question

which of the following types of carbon fixation is associated with plant stomata being open during the night?
a. c3
b. c4
c. cam
d. all of the above
please select the best answer from the choices provided
o a
o b
o c
o d

Explanation:

• C3 plants: Stomata are open during the day. Carbon fixation occurs in mesophyll cells.
• C4 plants: Stomata are open during the day. Carbon fixation occurs in mesophyll and bundle - sheath cells.
• CAM (Crassulacean Acid Metabolism) plants: Adapted to arid conditions. Stomata open at night (to reduce water loss during the hot day) to take in \(CO_2\), which is then stored as organic acids. During the day, the stomata close, and the stored \(CO_2\) is used for photosynthesis.

Answer:

C. CAM