Question
Biology Question on Transport in Plants
Most accepted theory for ascent of sap is
A
Pulsation theory
B
Transpiration pull theory
C
Capillary theory
D
Root pressure theory
Answer
Transpiration pull theory
Explanation
Solution
Transpiration pull cohesion theory for ascent of sap in trees is most widely accepted. This concept was proposed by Dixon and Jolly, 1884. It is based up on three basic assumptions which are cohesion in between water molecules, continuity of water column and transpiration pull.