Question

Which of these is a factor not related to transpiration pull?

• A. Capillarity
• B. Adhesion
• C. Cohesion
• D. Ascent of sap

Answer 1

The correct option is A Capillarity

(A) Capillarity is the motion of the liquid in a narrow passage which travels only up to a certain point where it balances the force of gravity of the column.

(B) Adhesion is the force of attraction which leads to the attraction between water and xylem molecule necessary for transpiration pull.

(C) Cohesion is the phenomenon of attraction between similar molecules, which makes water molecule remain attracted to each other while being lifted up by transpiration pull.

(D) The suction force which makes water to move in an upward direction is the ascent of sap caused by transpiration pull.

So, the answer is, "Capillarity".