AP BIOLOGY

Detailed explanation-1: -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-2: -Which part of the human body is most similar to stomata in plants? The lungs and airways.

Detailed explanation-3: -Stomata are the tiny, kidney, or bean-shaped pores or openings present in the epidermis of the cell. The stomatal opening has specialized guard cells surrounding them.

Detailed explanation-4: -Stomata are pores on the surfaces of leaves that function as bio-mechanical valves which control gas exchange in plants (Raven et al., 2005). Each stoma is bordered by a pair of curved, tubular guard cells (see Figure 1) that work together to control stomatal opening and closing.