Question

The rate of breathing in aquatic organisms is much faster than that seen in terrestrial organisms. Give reason.

CBSE Class X Science SA 2 (3 Marks)

Answer 1

The aquatic animals require dissolved oxygen for survival and breathing.
The solubility of dissolved oxygen in water is much lower.
So there is less amount of oxygen available
Because of less amount of oxygen there is difficulty in breathing in water
Hence, the rate of breathing is faster in aquatic animals.

Answer 2

$<b>Terrestrial animals can breathe the oxygen in the atmosphere, but animals that live in water need to use the oxygen dissolved in water. The amount of dissolved oxygen in water is fairly low compared to the amount of oxygen in the air. So the rate of breathing in aquatic organisms is much than faster than Terristrial animals.$

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