O-LevelBiologyCell Biology5090/11 · Oct/Nov 2014 · Q21 Mark
The list shows the absorption of three different substances by organisms. 1 mineral ions entering a root hair cell from the soil 2 oxygen entering the blood from an alveolus 3 water entering a root hair cell from the soil In each case, what is the mechanism of absorption?
Amineral ions: active transport, oxygen: active transport, water: diffusion
Bmineral ions: active transport, oxygen: diffusion, water: osmosis
Cmineral ions: diffusion, oxygen: active transport, water: diffusion
Dmineral ions: diffusion, oxygen: osmosis, water: active transport
✓ Correct answer
B: mineral ions: active transport, oxygen: diffusion, water: osmosis
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