Multiple choice

Most widely accepted explanation for the ascent of sap in plant is

  1. capillarity / Imbibition

  2. pulsating activity of living cells

  3. role of atmospheric pressure

  4. transpiration-cohesion theory

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The transpiration-cohesion-tension theory is the most widely accepted explanation for how water moves upward through the xylem against gravity. It relies on the cohesive properties of water and the pull generated by transpiration.