The photo above is of an aloe plant, that is also a CAM plant. Being a CAM plant simply means that the aloe utilizes the Crassulacean Acid Metabolism method, because its indigenous habitat is an arid environment. The plant's natural defense to a possible lack of water is to open a carbon fixation pathway at night, that takes in CO2. The CO2 is then fixed and stored, and is then released during the day.
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