AP BIOLOGY

Detailed explanation-1: -Carbon dioxide and oxygen cannot pass through the cuticle, but move in and out of leaves through openings called stomata (stoma = “hole"). Guard cells control the opening and closing of stomata. When stomata are open to allow gases to cross the leaf surface, the plant loses water vapor to the atmosphere.

Detailed explanation-2: -Plants absorb CO2 from the surrounding air and release water and oxygen via microscopic pores on their leaves called stomata. When stomata open, they let in CO2; however, while open, the stomata release oxygen and let water vapor escape.

Detailed explanation-3: -stoma (plural stomata) A tiny opening in the surface of a plant leaf or stem. It allows gases and water vapor to escape. Some plants close their stomata at night.

Detailed explanation-4: -For photosynthesis green plants take carbon dioxide from the air. The carbon dioxide enters the leaves of the plant through the stomata present on their surface. Each stomatal pore is surrounded by a pair of guard cells. The opening and closing of the pores of stomata is controlled by the guard cells only.

Detailed explanation-5: -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. Stomata are tiny, microscopic and critical for photosynthesis.