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← Nature & AnimalsWhich consequence results when excessive heat reduces atmospheric humidity affecting water supply to high-altitude vascular plants?
A)Increased tension reduces water column diameter
B)Limited evaporative cooling causes overheating✓
C)Reduced stomatal opening increases photosynthesis
D)Elevated phloem flow assists nutrient transport
💡 Explanation
Reduced humidity causes greater transpiration, creating runaway water loss, because evaporative cooling, normally facilitated by transpiration, becomes insufficient; therefore, the plant overheats, rather than benefiting from reduced vascular tension or altered stomatal function.
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