Which term describes the loss of water from plant leaves as water vapor?

Which term describes the loss of water from plant leaves as water vapor?

• A. Evaporation
• B. Transpiration
• C. Condensation
• D. Evapotranspiration

Answer: (B)

Transpiration is the loss of water from plant leaves as water vapor. It happens mainly through stomata, the tiny openings on the leaf surface, as water moves up the plant from the roots and is pulled to the atmosphere. This vapor loss helps drive the water transport system in the plant and is influenced by factors like stomatal opening, humidity, temperature, wind, and soil moisture. Evaporation would be water turning into vapor from any surface, not specifically leaves. Condensation is vapor turning into liquid. Evapotranspiration is the total water loss from a land area, combining evaporation from surfaces and transpiration from plants, but the question targets the leaf-specific process, which is transpiration.

Transpiration is the loss of water from plant leaves as water vapor. It happens mainly through stomata, the tiny openings on the leaf surface, as water moves up the plant from the roots and is pulled to the atmosphere. This vapor loss helps drive the water transport system in the plant and is influenced by factors like stomatal opening, humidity, temperature, wind, and soil moisture.

Evaporation would be water turning into vapor from any surface, not specifically leaves. Condensation is vapor turning into liquid. Evapotranspiration is the total water loss from a land area, combining evaporation from surfaces and transpiration from plants, but the question targets the leaf-specific process, which is transpiration.