DENDROLOGY

Detailed explanation-1: -Gaseous exchange occurs through diffusion via stomata. Guard cells regulate each of the stomata. Exchange of gases occurs with the closing and opening of the stoma between the inferior of leaves and the atmosphere.

Detailed explanation-2: -The movement of gases in green plants or the gaseous exchange in plants is called diffusion and it is regulated by the stomata.

Detailed explanation-3: -Stomata are composed of a pair of specialized epidermal cells referred to as guard cells (Figure 3). Stomata regulate gas exchange between the plant and environment and control of water loss by changing the size of the stomatal pore.