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What are segmented worms? Annelids, evolution, and biology

By |2018-04-13T14:37:43+00:00May 27th, 2017|Biology|

An annelid, or segmented worm Roundworms probably evolved into segmented worms, or annelids, about 545 million years ago. The earliest annelids all lived in the ocean, as most kinds of annelid still do today. Some annelids live inside of sponges. Their long bodies were shaped like a hollow tube, with a long tunnel running [...]