HORTICULTURE

Detailed explanation-1: -The exchange of oxygen and carbon dioxide in the leaf (as well as the loss of water vapor in transpiration) occurs through pores called stomata (singular = stoma). Normally stomata open when the light strikes the leaf in the morning and close during the night.

Detailed explanation-2: -Plants get carbon dioxide from the air through their leaves. The carbon dioxide diffuses through small holes in the underside of the leaf called stomata. It also allows the oxygen produced in photosynthesis to leave the leaf easily.

Detailed explanation-3: -This evolutionary innovation is so central to plant identity that nearly all land plants use the same pores-called stomata-to take in carbon dioxide and release oxygen.

Detailed explanation-4: -Carbon dioxide enters the leaf and oxygen and water vapour leave the plant through the stomata.

Detailed explanation-5: -When plants respire, the opposite is true: oxygen diffuses into the leaf and carbon dioxide is given out through the stomata.