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Biology · May / June 2019 · Paper 12 · Question 2

5090Diffusion and osmosis

Which process only occurs by diffusion?

  1. Amovement of sugars in the phloem
  2. Bmovement of water in the xylem
  3. Cuptake of carbon dioxide by the blood
  4. Duptake of glucose by the intestinal villi

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Correct answer: C. uptake of carbon dioxide by the blood

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