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Question

Rising column of water does not break its connection with xylem walls despite negative pressure or tension due to

A
Cohesion amongst water molecules
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B
Strong transpiration pull
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C
Adhesion
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D
Surface tension
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Solution

The correct option is C Adhesion
The attraction between the molecule of dissimilar substances is called adhesion. Walls of tracheid and vessels of xylem are made up of lignin and cellulose and due to adhesive force, they have a close affinity for water. Thus, a rising column of water does not break its connection with xylem walls despite negative pressure or tension.
So the correct answer is 'Adhesion'.

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