Multiple choice

___________ does not involve osmosis.

  1. Water from the soil entering a root hair

  2. Water passing from a root hair to adjacent cells

  3. Water passing up a xylem vessel element to the xylem vessel above it

  4. Water entering a mesophyII cell from a xylem vessel element

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Water movement up the xylem vessel is driven by transpiration pull and cohesion-tension mechanism, not osmosis. Osmosis is the movement of water across a semi-permeable membrane from low to high solute concentration. The other options (A, B, D) all involve water crossing cell membranes (root hair cells), which do involve osmosis.

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