<span>In marine vertebrates, the gill arches use the external gas exchange. The water holds less oxygen.
The ribs in terrestrial vertebrates have enclosed respiratory surface which is inside the body and comes as paired lungs.
Kidneys are efficient in excretion of regulation of water and nitrogenous wastes. Their reproduction is normally sexual with separate sexes.</span>
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The first land vertebrates appeared in the </span><span>Devonian which was about 360 million years ago.
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Explanation:
The effect of water stress on biomass accumulation is it effects the export of photoassimilates from leaves in both species
Definitely A !!!!!!!!!!!!!