NEET BIOLOGY

Detailed explanation-1: -The gas exchange in plants takes place through stomata, and the process is called diffusion. The stomata are found in all the aerial plants and not in the roots. Epidermal cells present in the stomata surrounding the guard cells of the stoma are called subsidiary cells.

Detailed explanation-2: -In roots, stems & leaves the exchange of gases takes place through diffusion. The surface of young stem have stomata, while that of an older stem have lenticel for gaseous exchange. Stomata are mainly present on the surface of leaves apart from the epidermal surface of young stem for gaseous exchange.

Detailed explanation-3: -Diffusion is the spontaneous movement of gases, without the use of any energy or effort by the body, between the alveoli and the capillaries in the lungs. Perfusion is the process by which the cardiovascular system pumps blood throughout the lungs.

Detailed explanation-4: -The movement of gases in green plants or the gaseous exchange in plants is called diffusion and it is regulated by the stomata.