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Biology · Oct / Nov 2019 · Paper 11 · Question 2

5090Diffusion and osmosis

Which statement is always correct for both diffusion and osmosis?

  1. AThey depend on energy from cells.
  2. BThey involve movement of particles down a concentration gradient.
  3. CThey involve the movement of water molecules.
  4. DThey take place only in liquids.

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Correct answer: B. They involve movement of particles down a concentration gradient.

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