AP BIOLOGY

Detailed explanation-1: -Kidney shaped cells that surround the stomata are called guard cells.

Detailed explanation-2: -Option A) The guard cells in dicot plants are kidney shaped and dumbbell shaped in monocots. When guard cells expand on the outer edges of the stoma, but not on the inner side, they result in kidney-shaped cells, leading to an opening or pore between the two guard cells for gas exchange.

Detailed explanation-3: -Stomata are tiny pores or openings on the green parts of a plant, especially the leaves. They enable gaseous exchange through them. They also are responsible for transpiration to occur in plants. Stomata are surrounded by kidney-shaped guard cells, which regulate and control their opening and closing.