Multicellular animals need exchange surfaces because their small surface area to volume ratio makes efficient substance exchange difficult.
Por que os organismos multicelulares (animais) precisam de superfícies de troca? Porque eles têm uma pequena relação superfície:volume, o que significa que é difícil trocar substâncias suficientes.
| Front | Why do multicellular organisms(animals) need exchange surfaces? |
|---|---|
| Back | Because they have a small surface area:volume which means that it is difficult to exchange enough substances. |
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