随意 Pop Quiz

When transpiration is at a maximum rate, 树 trunks decrease in diameter. Which statement explains this?
Choose the right answer:
Option A The water in the xylem vessels is under increased tension
Option B There is decreased suction pressure in the leaves
Option C There is less adhesion between water and xylem vessel walls
Option D There is less water in the xylem vessels
 FuyuumiAmakusa posted 一年多以前
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