HORTICULTURE

Detailed explanation-1: -CAM plants are typically dominant in very hot, dry areas, like deserts.

Detailed explanation-2: -Answer and Explanation: C4 plants occur more commonly in desert conditions because they do not have to keep their stomata open as long. C4 plants use their four-carbon sugar to store more carbon dioxide when the stomata are open at night.

Detailed explanation-3: -However, C4 and CAM do not exist in the same plant. It is interesting to note that the only cacti to use C3 photosynthesis is the primitive pereskia. C4 and CAM photosynthesis are both adaptations to arid conditions, because they are more efficient in the conservation of water.

Detailed explanation-4: -C4 plants-including maize, sugarcane, and sorghum-avoid photorespiration by using another enzyme called PEP during the first step of carbon fixation.