CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they:.f a. ix CO2 into organic acids during the night when temperatures are cooler.
b. fix CO2 into by combining it with RuBP in the Calvin cycle.
c. obtain CO2 through their roots during the day.
d. fix CO2 into organic acids in the mesophyll cells, which do not rely on stomata.