O-LevelBiologyCell Biology5090/12 · May/June 2019 · Q21 Mark
Which process only occurs by diffusion?
Amovement of sugars in the phloem
Bmovement of water in the xylem
Cuptake of carbon dioxide by the blood
Duptake of glucose by the intestinal villi
✓ Correct answer
C: uptake of carbon dioxide by the blood
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