mass transport past paper question

Question 1

Describe the cohesion-tension theory of water transport in the xylem.

Answer 1

1.Water lost from leaf because of transpiration / evaporation of water
(molecules) / diffusion from mesophyll / leaf cells;
OR
Transpiration / evaporation / diffusion of water (molecules)
through stomata / from leaves;
2. Lowers water potential of mesophyll / leaf cells;
3.Water pulled up xylem (creating tension);
4.Water molecules cohere / ‘stick’ together by hydrogen bonds;
5.(forming continuous) water column;
6.Adhesion of water (molecules) to walls of xylem;