Xylem transport of water in tall trees appears to mainly due to .
(a) Mctabolic activity in xylem, (b) root pressure , (c) capillary rise in xylem open pipes , (d) transpiration pull and cohesion of water molecules .
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d) transpiration pull and cohesion of water molecules
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The correct option is (d) transpiration pull and cohesion of water molecules.
- In cohesion, water is bound to other water molecules forming a continuous chain.
- Cohesion and adhesion ease transpiration.
- Cohesion and adhesion build a suction pressure and helps in transpiration.
- Up to the root there is root pressure in which water transport is through osmosis. after this water is transported mainly through transpiration pull.
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