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← Nature & AnimalsWhich outcome consistently decreases xylem tension as atmospheric humidity increases around a plant?
A)Stomata closure reduces water potential
B)Transpiration rate falls maintaining leaf hydration✓
C)Root pressure overcomes gravitational forces
D)Cohesion increases, aiding water molecule ascent
💡 Explanation
The transpiration pull lessens, decreasing the pressure gradient because as humidity rises, the difference in water vapor between the leaf and air reduces, slowing transpiration and xylem tension. Therefore correct answer is the reduced gradient, rather than stomatal closure or root pressure exclusively.
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