Question

the rate of breathing in aquatic organisms is much faster than in terrestial animals

Answer 1

The breathing rate of aquatic animals is faster than that of terrestrial animals because the amount of dissolved oxygen in the water in much less than the amount on land, so they have to breathe more in order to get more oxygen.
Oxygen concentrations are much higher in air, which is about 21% oxygen, than in water.

Answer 2

$<b>The amount of dissolved oxygen is fairly low compared to the amount of oxygen in the air. So the rate of breathing in aquatic organisms is much than terrestrial animals$

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