You are on a marine biology expedition in the sea and have discovered a new species of worm that has never been described! What characteristics would this species have to have to be placed into one of the phyla and classes described by your text book? What characteristics would it have to have (or lack) for you to decide you've discovered a whole new phylum of worms?
Added by Cindy W.
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For example, if it's a type of annelid (segmented worm), it would need to have a segmented body, a well-developed coelom (body cavity), and a complete digestive system. If it's a type of nematode (roundworm), it would need to have a cylindrical, unsegmented body, Show more…
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