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The rate of breathing in aquatic organis...

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

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A terrestrial organism can obtain oxygen directly from the air and have slow breathing rate but aquatic organisms have to obtain oxygen for respiration which is dissolved in water. Since, the amount of oxygen dissolved in water is fairly low as compared to the amount of oxygen in air the rate of breathing in aquatic organism is much faster.
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