Marine flatworms and planarians are ______ in mostly aquatic environments, while tapeworms and flukes are ______, living within a host animal.Multiple choice question.heterotrophic; autotrophicparasitic; free-livingfree-living; parasiticautotrophic; heterotrophic

Marine flatworms and planarians are ______ in mostly aquatic environments, while tapeworms and flukes are ______, living within a host animal.

A group of annelids that live mostly in freshwater habitats is the ______.Multiple choice question.flatwormsleechesclam wormsearthwormsroundworms

Polychaetes are annelid worms that live in the ______ habitat.Multiple choice question.terrestrialmarinefreshwater

Cnidarians are organisms found mostly in ______ habitats.Multiple choice question.terrestrialmarinefreshwater

Earthworms and leeches are one group of ______, while another group is the marine, segmented worms called polychaetes.Multiple choice question.crustaceansarthropodsmollusksannelids