**Osmosis** is the movement of:
ASolute particles through a semipermeable membrane
BSolvent (water) through a semipermeable membrane from low solute concentration to high solute concentration
CBoth solute and solvent down a pressure gradient
DIons against a concentration gradient using ATP
Answer & Solution
Correct answer: B. Solvent (water) through a semipermeable membrane from low solute concentration to high solute concentration
Osmosis = passive movement of solvent (water in biology) across a semipermeable membrane from a hypotonic (low solute, high water potential) to hypertonic (high solute, low water potential) region. No ATP required.
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