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Nature & Animals

Which xylem vessel consequence develops under elevated leaf temperatures?

A)Increased viscosity reduces water flow
B)Cavitation obstructs water transport upwards
C)Decreased root pressure limits uptake
D)Transpiration rates facilitate nutrient absorption

💡 Explanation

Increased leaf temperature enhances water evaporation rate, forming vapor bubbles. This causes cavitation to disrupt the pulling force in xylem tracheids, because cohesion-tension stalls, and therefore decreases water transport, rather than other effects on root pressure.

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