Continuous upward flow of water stream in tal | vedclass

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(D) The continuous upward movement of water,known as the ascent of sap,is maintained by the cohesion-tension theory. $1$. Cohesive forces (attraction

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cohesive force between molecules and transpiration pull

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(D) The continuous upward movement of water,known as the ascent of sap,is maintained by the cohesion-tension theory. $1$. Cohesive forces (attraction between water molecules) and adhesive forces (attraction between water and xylem walls) prevent the water column from breaking. $2$. Transpiration pull,generated by the evaporation of water from the leaves,creates a negative pressure (tension) that pulls the water column upward against the force of gravity.

Continuous upward flow of water stream in tall trees is maintained due to . . . . . . .

Similar Questions

Given below are two statements.
Statement $I$ - Presence of capillary water is essential.
Statement $II$ - High concentration of solutes in soil water reduces the rate of absorption of water.
In the light of the above statements,select the correct option given below:

The most widely accepted explanation for the ascent of sap in trees is:

Exudation of xylem sap at the cut end of stem is due to . . . . . . pressure.

Which is the most widely accepted theory for the ascent of sap in trees?

According to one vital force theory,the ascent of sap is due to the active pulsation of the innermost layer of the cortex. This theory was proposed by:

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