What are segmented worms? Annelids, evolution, and biology

By |2019-01-27T20:52:49-07:00May 27th, 2017|Biology|

An annelid, or segmented worm When did annelids evolve? Roundworms probably evolved into segmented worms, or annelids, about 545 million years ago. What's a roundworm? More about the Proterozoic All our biology articles What were annelids like? The earliest annelids all lived in the ocean, as most kinds of annelid still do today. Some [...]