AP BIOLOGY

Detailed explanation-1: -Stomata (singular: stoma) are tiny pores present on the surface of the leaves. Through they are found on both upper and lower epidermis of leaf but they are more in number on the lower epidermis. Each stoma is bounded by two kidney-shaped guard cells . These guard cells possess a nucleus and a number of chloroplasts.

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.

Detailed explanation-3: -Guard cell function 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. Each guard cell has a relatively thick cuticle on the pore-side and a thin one opposite it.

Detailed explanation-4: -Plants absorb carbon dioxide from the air through tiny pores called stomata.

Detailed explanation-5: -Stomata are cell structures in the epidermis of tree leaves and needles that are involved in the exchange of carbon dioxide and water between plants and the atmosphere. From: Introduction to Forestry and Natural Resources, 2013.