Why are smaller creatures able to survive without the complex structural features of large and complex animals?
Added by Miguel M.
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Smaller creatures have smaller organs and less tissue, so they can't support as much weight or as many Show more…
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Madhur L.
Why do larger animals have complex internal systems to exchange nutrients and wastes with their environments? Because there is not sufficient surface area on the outside of a large animal for the exchange required by their body mass (volume). Because wastes break down much faster in larger animals and become toxic more quickly Because larger animals almost exclusively produce ammonia, which requires a specialized exchange surface to eliminate Because they often live in environments with less available oxygen
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