Ascent of xylem sap, caused due to transpiration, depends mainly on three physical properties of water. These properties result in

Step-by-step solution

The transpiration driven ascent of xylem sap depends mainly on the following physical properties of water: • Cohesion – mutual attraction between water molecules. • Adhesion – the attraction of water molecules to polar surfaces (such as the surface of tracheary elements). • Surface Tension – water molecules are attracted to each other in the liquid phase more than to water in the gas phase. These properties give water high tensile strength, i.e., an ability to resist a pulling force, and high capillarity, i.e., the