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← Nature & AnimalsWhich force balances hydrostatic pressures to facilitate xylem water transport?
A)Cohesion-tension mechanism✓
B)Gravitational fluid sinking
C)Capillary action reduction
D)Osmotic solute accumulation
💡 Explanation
Water ascent against gravity uses the cohesion-tension mechanism, as transpiration creates a negative pressure gradient, passively pulling up while balanced cohesion and adhesion forces resist tensile stress; therefore water flows upward rather than succumbing exclusively to gravity or osmotic pull.
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