AP BIOLOGY

Detailed explanation-1: -Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata. Light is the main trigger for the opening or closing.

Detailed explanation-2: -Solution : Guard cells help in transpiration. Stomata are surrounded by two specialised epidermal cells, called guard cells. Because of their small size guard cells are repidily influenced by turgor changes and thus regulate the opening and closing of stomata.

Detailed explanation-3: -Guard cells are pairs of epidermal cells that control gas diffusion by regulating the opening and closure of stomatal pores.

Detailed explanation-4: -Guard cells are adapted to their function by allowing gas exchange and controlling water loss within the leaf. The size of the stomatal opening is used by the plant to control the rate of transpiration and therefore limit the levels of water loss from the leaf. This helps to stop the plant from wilting .

Detailed explanation-5: -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.