AP BIOLOGY

Detailed explanation-1: -On the upper and lower parts of the leaf, there are small pores or openings known as stomata. Stomata are surrounded by the guard cells. These guard cells regulate the opening and closing of stomata. Stomata help the leaf in the exchange of gases.

Detailed explanation-2: -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. Thousands of them dot on the surface of the plants.

Detailed explanation-3: -Stomata (singular stoma, from the Greek for “mouth”) are pores on the surface of the leaves and other aerial parts of most higher plants that allow uptake of CO2 for photosynthesis and the loss of water vapor from the transpiration stream.

Detailed explanation-4: -The stomata are apertures in the epidermis, each bounded by two guard cells. In Greek, stoma means “mouth”, and the term is often used with reference to the stomatal pore only. Esau (1965, p. 158) uses the term stoma to include the guard cells and the pore between them, and we will use her definition.

Detailed explanation-5: -Stomata are tiny openings or pores in plant tissue that allow for gas exchange. Stomata are typically found in plant leaves but can also be found in some stems. Specialized cells known as guard cells surround stomata and function to open and close stomatal pores.