Figure 10.3
-CAM plants keep stomata closed in 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 photosystems I and II at night.

Question

Figure 10.3 
-CAM plants keep stomata closed in 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 photosystems I and II at night.

Quizplus · Accepted Answer

CAM plants fix CO₂ into organic acids during the night in mesophyll cells, which are stored in vacuoles until daytime. This allows them to perform photosynthesis during the day without opening stomata and losing water.

Figure 10.3 -CAM Plants Keep Stomata Closed in Daytime, Thus Reducing Loss