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: -Stomata are responsible for allowing gas exchange between the inside of the leaf and the atmosphere. Stoma is the singular and stomata is the plural form.

Detailed explanation-3: -Stomata are pores in the leaf that allow gas exchange. Each stoma is guarded by guard cells. When these guard cells open during photosynthesis, carbon dioxide enters the leaves and water vapour and oxygen goes out of the leaves. Stomata are present usually on the underside of the leaves.

Detailed explanation-4: -Stomata facilitate not only the uptake of CO2 but also the exchange of all gases between the aerial parts of the plant and the atmosphere. Water vapour and oxygen molecules exit the leaf through the same path as CO2 enters, but usually in the opposite direction (Figure

Detailed explanation-5: -The alveoli are the sites of gas exchange; they are located at the terminal regions of the lung and are attached to the respiratory bronchioles.