Biology for IGCSE & O level - Transport In Plants (Section 2 - No. 38)
What is the role of cohesion in the transpiration stream?
Water molecules sticking to each other
Water molecules sticking to the walls of xylem vessels
Water molecules being pushed up by root pressure
Water molecules dissolving minerals
Explanation
Cohesion is the attraction of water molecules to each other, forming a continuous water column in the xylem.
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