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20 July, 09:00

How do fish obtain oxygen?

a - Oxygen diffuses across their skin.

b - Their body cells break down water molecules (H2O) and release the oxygen.

c - They inhale oxygen at the surface of the water.

d - They take in oxygen gas dissolved in the water through their gills.

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  1. 20 July, 10:05
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    d - They take in oxygen gas dissolved in the water through their gills.
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