Animals are something that are known as multicellular eukaryotes: Complicated lifeforms that consume organic material, breathe oxygen and live now as the varied and complex creatures we see today....
Their earliest ancestors looked nothing like them, and likely started as small and basic organisms....
They may have even been a sponge, similar to sea sponges. These sponges are a kind of organism still in existence today, whose close relatives, according to scientists, are a good candidate for e
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每日快报-科学
2021-12-14 00:00:00.0