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← Nature & AnimalsWhich outcome impairs plant water transport during hot, dry conditions?
A)Xylem cavitation disrupts continuous water columns✓
B)Increased root pressure causes cellular bursting
C)Guard cell turgor ensures stomata opening
D)Phloem loading decreases osmotic gradients
💡 Explanation
Xylem experiencing significant tension from high transpiration rates can cause xylem cavitation, because air bubbles disrupt the water column, halting upward water transport. Therefore, transpiration lowers water potential, rather than increasing root pressure, creating stomatal turgor, or affecting phloem.
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