The process by which plants lose water through stomata in the leaves is called?

The process by which plants lose water through stomata in the leaves is called?

• A. Evaporation
• B. Osmosis
• C. Transpiration
• D. Translocation

Answer: (C)

Transpiration is the process by which water is lost from a plant through the stomata, the tiny pores on leaf surfaces. When stomata are open to allow gas exchange for photosynthesis, water vapor diffuses from the leaf interior to the atmosphere, driven by the humidity difference between inside the leaf and the air. This loss of water creates a pull that helps move water upward from the roots through the xylem—the cohesion-tension mechanism that keeps water moving through the plant. It’s distinct from evaporation in general, which can happen from any surface; osmosis, the diffusion of water across a membrane; and translocation, the movement of sugars through the phloem.

Transpiration is the process by which water is lost from a plant through the stomata, the tiny pores on leaf surfaces. When stomata are open to allow gas exchange for photosynthesis, water vapor diffuses from the leaf interior to the atmosphere, driven by the humidity difference between inside the leaf and the air. This loss of water creates a pull that helps move water upward from the roots through the xylem—the cohesion-tension mechanism that keeps water moving through the plant. It’s distinct from evaporation in general, which can happen from any surface; osmosis, the diffusion of water across a membrane; and translocation, the movement of sugars through the phloem.