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Nature & Animals

Which outcome prevents excessive xylem sap cavitation following leaf damage?

A)Pectin plugging of xylem vessel pits
B)Decreased root osmotic water uptake
C)Increased photosynthetic carbon fixation
D)Elevated leaf boundary layer resistance

💡 Explanation

Occlusion prevails because embolism spread through pit membranes is minimized by pectin deposition called 'pit clogging', therefore limiting xylem cavitation rather than altering root function since pit clogging is a targeted mechanism.

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