A column of water within xylem vessels of tall trees does not break under its weight because of

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

lignification of xylem vessels

positive root pressure

dissolved sugars in water

tensile strength of water

answer is D.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

The water column within xylem vessel is not broken due to its weight at normal transpiration rates and at normal temperature because water has high tensile strength due to its high cohesive force.
(1) Lignification of inner walls of xylem vessels helps in adhesion of water to wall surface of vessel to avoid detachment of water column from vessel surface under tension.
(2) Water column is not broken due to cohesive force of water and not due to root pressure. Root pressure is not developed during active transpiration.
(3) Very little amount of sugar is present in xylem sap, which has no role in preventing the breakage of water
column of xylem.

Watch 3-min video & get full concept clarity