Multiple choice The most widely accepted theory for ascent of sap in trees is role of atmospheric pressure pulsating action of living cells transpiration pull and cohesion theory root pressure theory Reveal answer Fill a bubble to check yourself C Correct answer Explanation The transpiration pull and cohesion theory (Cohesion-Tension theory) is the most widely accepted explanation for the ascent of sap because it accounts for the physical forces needed to move water over great heights.