A CAM plant is a plant that utilizes Crassulacean acid metabolism (CAM) as an adaptation for arid conditions. Carbon dioxide entering the stomata during the night is converted into organic acids, which release carbon diozide for the Calvin Cycle during the day, when the stomata are closed. CAM plants often have reduced leaves with a low surface-area-to-volume ratio. The rubisco is provided with a high concentration of carbon dioxide while the stomata is closed to prevent too much water loss. These plants thrive under desert conditions.