Which statement helps to explain why water molecules are forced to move through xylem vessel elements as a consequence of transpiration?
1 )
Water molecules form hydrogen bonds with cellulose in the walls of xylem vessel elements in a process known as adhesion.
Water molecules form hydrogen bonds with neighbouring water molecules in a process known as cohesion.
3 )
Water molecules form ionic bonds with dissolved mineral ions, which helps to keep the water molecules together in a continuous column.
4 )
Water has a high latent heat of vaporisation and this prevents the evaporation of water in the xylem vessel elements.
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