What provides the main force for the upward movement of water in a plant's xylem?
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Active transport by root cells
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Evaporation of water from leaves (Transpiration pull)
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Gravitational pull
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Phloem pressure
📝 Detailed explanation
As water evaporates from the mesophyll cells in the leaves, it creates a tension (negative pressure) that pulls the water column up through the xylem.
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