The term transpiration refers to water loss from a plant through the ____.

The term transpiration refers to water loss from a plant through the ____.

• A. Xylem
• B. Root hairs
• C. Phloem
• D. Stoma

Answer: (D)

Transpiration is water loss from a plant through the stomata. Stomata are tiny openings, mainly on the underside of leaves, that regulate gas exchange and water loss. When these pores are open, water vapor escapes from inside the leaf into the air, which also helps create a pull that draws water up through the xylem from the roots. The other options describe different plant functions: xylem transports water within the plant, root hairs absorb water from the soil, and phloem moves sugars and other nutrients.

Transpiration is water loss from a plant through the stomata. Stomata are tiny openings, mainly on the underside of leaves, that regulate gas exchange and water loss. When these pores are open, water vapor escapes from inside the leaf into the air, which also helps create a pull that draws water up through the xylem from the roots. The other options describe different plant functions: xylem transports water within the plant, root hairs absorb water from the soil, and phloem moves sugars and other nutrients.