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

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Solution

Terrestrial organisms take up oxygen from the atmosphere whereas aquatic animals need to utilize oxygen present in the 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 have to show various adaptations for better gaseous exchange.

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

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Q. With regards to obtaining oxygen for respiration a terrestrial organism has advantages over an aquatic organism.Give reasons to support this statement

(a) Why is diffusion insufficient to meet the oxygen requirements of large multicellular organisms like humans ?
(b) What type of arrangement exists in the bodies of large animals to meet their oxygen requirements adequately ?
(c) What advantage a terrestrial animal has over an aquatic animal with regard to obtaining oxygen for respiration ?

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