Question

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

Answer 1

Answer :

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.

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Answer 2

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Terrestrial organisms take oxygen from the air which is much denser than water. In air the oxygen content is much more, so the terrestrial organisms gets sufficient oxygen to meet the demand of oxygen for high energy needs. But the aquatic organisms needs to breath faster in water because there oxygen in found in dissolved form. So they spent much energy to breath faster to obtain as much oxygen as possible. The rate of diffusion of oxygen is also faster in air than in water.


$\boxed{ \bf{Extra \: \: Information :}}$


$\bf{\underline{Aquatic \: Organisms}}$ : The organisms which live on water are called aquatic organisms.

$\bf{\underline {Terrestrial \: Organisms}}$ : The organisms which which live on land are called terrestrial organisms.