HORTICULTURE

Detailed explanation-1: -The stomata/lenticels are responsible for exchange of substances through a plant. Thus, exchange occurs through the process of diffusion. Diffusion in the process of movement of substance from a region of higher concentration to a region of lower concentration.

Detailed explanation-2: -Stomata are the centres of exchange of gases in plants. The gases diffuse into the intercellular spaces of the leaf through these pores, which are normally on the underside of the leaf.

Detailed explanation-3: -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-4: -Diffusion is a process in which transport is driven by a concentration gradient. Gas molecules move from a region of high concentration to a region of low concentration. Blood that is low in oxygen concentration and high in carbon dioxide concentration undergoes gas exchange with air in the lungs.

Detailed explanation-5: -The only way for gases to diffuse in and out of the leaf is though small openings on the underside of the leaf, the stomata. These stomata can open and close according to the plant’s needs. The tissues of the leaf in between the epidermal cells, into which gases diffuse from the stomata, are called mesophyll.