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← Nature & AnimalsWhich outcome occurs to xylem transport when stomatal resistance significantly increases in an oak tree?
A)Increased water transport due to root pressure
B)Decreased transpiration stream from leaves✓
C)Enhanced nutrient uptake from soil
D)Higher photosynthetic activity in leaves
💡 Explanation
Increasing stomatal resistance reduces transpiration because the cohesion-tension mechanism relies on water evaporation from leaves to pull water up the xylem. Therefore, the transpiration stream decreases, rather than root pressure increasing, as root pressure is generally weaker.
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