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← Nature & AnimalsWhich outcome follows decreased root endodermis membrane water permeability?
A)Lower transpiration rate from leaves✓
B)Increased xylem water column tension
C)Enhanced long-distance sucrose translocation
D)Greater soil nutrient ionic diffusion
💡 Explanation
Reduced permeability constrains water entry via osmosis, initiating decreased root pressure; because of the cohesion-tension mechanism in xylem, xylem’s water rise is limited, diminishing leaf transpiration. If water potential maintained, rather than restricted ascent, there follows lower, rather than higher xylem tension.
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