CAM plants keep stomata closed in daytime, thus reducing loss of water. They can do this because they

Question

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CAM plants fix CO2 into organic acids during the night through the process of crassulacean acid metabolism (CAM). These acids are stored in vacuoles until the next day, when the stomata remain closed to prevent water loss during the hot and dry daytime conditions. The stored acids are then decarboxylated to release CO2 for fixation into sugars, which occurs in the bundle-sheath cells.

CAM Plants Keep Stomata Closed in Daytime, Thus Reducing Loss