This is a picture of a cactus. A cactus is an example of a CAM Plant. A CAM Plant (Crassulaeum acid metabolism) is any plant that goes through photosynthesis but only takes in carbon dioxide at night. In a plant using CAM, the stomata (openings in the plant) remained closed during the day to reduce evaporation of it's water, but open up at night to take in carbon dioxide. This is how cacti and other CAM plants adapt to the hot weather they are growing in.
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