AP BIOLOGY

Detailed explanation-1: -CAM plants store the CO2 mostly in the form of malic acid via carboxylation of phosphoenolpyruvate to oxaloacetate, which is then reduced to malate.

Detailed explanation-2: -In CAM plants, stomata open at night when conditions are relatively cool and humid. PEP carboxylase is active at night, fixing inorganic carbon into C4 acids that are stored in large vacuoles.

Detailed explanation-3: -CAM Photosynthesis is for Plants Adapted to Dry Environments However, there is no light at night to do photosynthesis. To solve this, CAM plants have evolved to take in CO2 at night and store it in the central vacuole in the form of an acid.

Detailed explanation-4: -The mechanism was first discovered in plants of the family Crassulaceae. During the night, a plant employing CAM has its stomata open, allowing CO2 to enter and be fixed as organic acids that are stored in vacuoles.

Detailed explanation-5: -Crassulacean Acid Metabolism (CAM) Photosynthesis In this pathway, stomata open at night, which allows CO2 to diffuse into the leaf to be combined with PEP and form malate. This acid is then stored in large central vacuoles until daytime.