Question

The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of

• A. Weak gravitational pull
• B. Cohesion and adhesion
• C. Lignified thick wall
• D. Transpiration pull

Answer 1

The correct option is B

Cohesion and adhesion

There are a large number of treachery elements running together, the blockage of one or a few of them does not cause any breakage in the continuity of the water column. The column of water does not fall under the impact of gravity because forces of transpiration provide energy. Water molecules remain attached to one another by strong mutual forces of attraction called cohesion and adhesion forces.