DENDROLOGY

Detailed explanation-1: -There are less stomata in desert plants as the leaves are modified to form spines and photosynthesis occurs in the green stem. The stomata does not open during the day to avoid water loss and only opens during the night for carbon dioxide to enter the plant.

Detailed explanation-2: -Only in desert stem succulents during drought do stomata remain so tightly closed in the light that the photosynthetic tissues are dependent on internal CO2 generated through the photosynthetic pathway known as crassulacean acid metabolism2.

Detailed explanation-3: -During the day, when it is hot and dry, they close their stomata to prevent water loss. This process of opening and closing the stomata affects how much carbon dioxide the plants can take in. Carbon dioxide is needed for photosynthesis, the process that produces food for the plant.