The ascent of xylem sap in plants is mainly a | vedclass

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(C) The ascent of xylem sap is primarily driven by the transpiration pull,which is generated by the evaporation of water from the leaves.This process

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cohesion and adhesion between water molecules

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(C) The ascent of xylem sap is primarily driven by the transpiration pull,which is generated by the evaporation of water from the leaves.This process relies on the physical properties of water,specifically cohesion (attraction between water molecules) and adhesion (attraction of water molecules to the polar surfaces of xylem vessel elements).Together with surface tension,these forces create a continuous water column that is pulled upward through the xylem as water evaporates from the stomata.While root pressure contributes to the movement of water in some plants,it is not the primary mechanism for the ascent of sap in tall trees.

The ascent of xylem sap in plants is mainly accomplished by the :

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