AP BIOLOGY

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).

Detailed explanation-2: -The exchange of gasses in leaves: In leaves respiration takes place by diffusion of oxygen through stomata into the cells of the leaf from where the carbon dioxide is released into the atmosphere.

Detailed explanation-3: -Gas exchange in plants is achieved by stomata and lenticels. The epidermis has tiny pores called stomata (singular, stoma) that control transpiration and gas exchange with the air. During the day when photosynthesis occurs, the oxygen released from the process is utilized for respiration.

Detailed explanation-4: -Leaves of plants have tiny pores called stomata, which is used for the exchange of gases. The oxygen, taken in through stomata is used by the cells in the leaves to break down glucose into carbon dioxide and water. Similarly, roots of plants take in air from the air spaces present between the soil particles.

Detailed explanation-5: -Thus, during the daytime, oxygen diffuses out and carbon dioxide diffuses in. (b) At night, as photosynthesis does not takes place, oxygen is not produced. Thus, oxygen from the air diffuses into the leaves to carry out respiration. And carbon dioxide produced by respiration diffuses out into the air.