NEET BIOLOGY

Detailed explanation-1: -Answer: The transpiration driven ascent of xylem sap depends mainly on the following physical properties of water (i) Cohesion Mutual attraction between water molecules. (ii) Adhesion Attraction of water molecules to polar surfaces (such as the surface of tracheary elements).

Detailed explanation-2: -Cohesion, adhesion and surface tension-keep the water in place.

Detailed explanation-3: -Upward movement of water against gravity or ascent of sap in plants depends mainly on cohesion and adhesion of water molecules.

Detailed explanation-4: -Adhesion cohesion and surface tension enable water to make a continuous column of water in the xylem vessels. Thus. water is pulled as a column by the transpiration pull. Was this answer helpful?

Detailed explanation-5: -Two major factors influence the rate of water flow from the soil to the roots: the hydraulic conductivity of the soil and the magnitude of the pressure gradient through the soil. Both of these factors influence the rate of bulk flow of water moving from the roots to the stomatal pores in the leaves via the xylem.