NEET BIOLOGY

Detailed explanation-1: -The opening and closing of stomata are controlled by specialized cells called guard cells. The turgor pressure in the guard cells controls the opening and closing of the guard cells. Stomatal pores open when guard cells enlarge as a result of water absorption and close when guard cells shrink.

Detailed explanation-2: -Guard cells control the opening and closing of stomata. When stomata are open to allow gases to cross the leaf surface, the plant loses water vapor to the atmosphere.

Detailed explanation-3: -The stomatal pores which penetrate the epidermis are major ports of exit and entry to the interior of the plant. Since these pores can be opened and closed by the very specialized epidermal guard cells which surround them, vapor and gas exchanges between the plant and its environment can be regulated.