Structure of Water and Hydrogen Bonding

AP Biology· difficulty 2/5

Water rises in narrow xylem vessels in plants because of

A
$Cohesion + adhesion (capillary action)$
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B
$Osmosis from soil into the leaf tissues$
C
$Phototropism driven by auxin gradients$
D
$Active transport powered by ATP in xylem$

Explanation

Water adheres to vessel walls and coheres to itself, creating a continuous column that can rise against gravity in narrow tubes.

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