SSC MTS EXAM

Detailed explanation-1: -Transpiration (evaporation) occurs because stomata are open to allow gas exchange for photosynthesis. As transpiration occurs, it deepens the meniscus of water in the leaf, creating negative pressure (also called tension or suction).

Detailed explanation-2: -What happens to the tension in the xylem when the stomata close and evaporation stops? It goes to zero once evaporation ceases.

Detailed explanation-3: -The bulk of water absorbed and transported through plants is moved by negative pressure generated by the evaporation of water from the leaves (i.e., transpiration)-this process is commonly referred to as the Cohesion-Tension (C-T) mechanism.