Question

What advantage over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for respiration?
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Answer 1

Explanation:

Terrestrial organisms take up oxygen from the atmosphere whereas aquatic animals obtain oxygen from water. Air contains more O2 as compared to water. Since the content of O2 in air is high, the terrestrial animals do not have to breathe faster to get more oxygen. Therefore, unlike aquatic animals, terrestrial animals do not need adaptations for gaseous exchange.

Answer 2

Answer:

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Since, the solubility of oxygen in water is less, there is not much oxygen available for aquatic organisms and so, they have to breathe at a faster rate. On the other hand, terrestrial animals take oxygen directly from atmosphere, so their rate of breathing is comparatively less.