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← Nature & AnimalsWhich consequence results when a plant stem's water column cavitates?
A)Reduced xylem water transport efficiency✓
B)Increased osmotic root water absorption
C)Enhanced phloem sucrose unloading rate
D)Elevated guard cell turgor pressure
💡 Explanation
Cavitation introduces air bubbles blocking water's continuous pathway; thus reduced xylem transport occurs because the cohesion-tension mechanism fails due to disrupted transpirational pull along water. Therefore, efficiency drops, rather than increasing root absorption or affecting phloem transport directly.
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