Lignin and cellulose have affinity for water. This is called

Adhesion

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Cohesion

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Root pressure

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None of the above

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Solution

The correct option is B Adhesion
The attraction between the molecules of dissimilar substances is termed as adhesion.
Walls of tracheid and vessels of xylem are made up of lignin and the cellulose. Hence due to the adhesive force, they have an affinity for water.
So, the correct answer is option A.

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Lignin and cellulose present in xylem vessels shows affinity for water due to

Question 30
Cork cells are made impervious to water and gases by the presence of

(a) cellulose
(b) lipids
(c) suberin
(d) lignin

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