AP BIOLOGY

Detailed explanation-1: -Guard cells are located in the leaf epidermis and pairs of guard cells surround and form stomatal pores, which regulate CO2 influx from the atmosphere into the leaves for photosynthetic carbon fixation. Stomatal guard cells also regulate water loss of plants via transpiration to the atmosphere.

Detailed explanation-2: -In the epidermis of the leaf, there are small pores present that are responsible for the exchange of gases in and out of the intercellular spaces known as stomata. The structure of each stoma is bounded by a pair of specialized epidermal cells known as guard cells.

Detailed explanation-3: -Guard cells are kidney shaped cells that surrounds the stomata. They control the opening and closing of the stomata. When the plant has an excess of water, the guard cells swell and create an opening for the exchange of gases.

Detailed explanation-4: -Guard cells are found connected to adjacent epidermal cells. Pair of guard cells are found in stomata where they surround the stomata on the upper and lower epidermis of leaves.