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Q.

Cohesion-tension-transpiration pull model is for-

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a

Guttation

b

Ascent of sap in xylem

c

Descent of sap in xylem

d

Ascent of sap in phloem

answer is A.

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Detailed Solution

Most researchers agree that water is mainly ‘pulled’ through the plant, and that the driving force for this process is transpiration from the leaves. This is referred to as the cohesion-tension-transpiration pull model of water transport in xylem.

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