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← Nature & AnimalsWhich factor primarily reduces surface tension in xylem?
A)Cavitation breaks water cohesion✓
B)Guttation exceeds transpiration capacity
C)Increased vessel element diameter
D)Root pressure forces xylem upward
💡 Explanation
Air bubble introduction causes cavitation, which interferes with cohesive forces because it disrupts the continuous water column required for cohesion-tension, therefore lowering surface tension, rather than diameter affecting baseline properties, or pressure directly influencing tension.
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