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← Nature & AnimalsWhich risk rises when soil near xylem dries?
A)Increased leaf abscission hormone production✓
B)Enhanced root pressure water uptake
C)Elevated leaf turgor optimal output
D)Greater carbohydrate transport via phloem
💡 Explanation
Leaf abscission increases due to increased abscisic acid stimulating the mechanism of stomatal closure reducing transpiration to conserve water; therefore, leaf drop is promoted because root pressure reduces rather than allowing optimization.
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