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

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

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

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

Within phylum Cnidaria, the class that includes the most species is Blank______.Multiple choice question.HydrozoaAnthozoaStaurozoaCubozoaScyphozoa

Select the two main categories of aquatic biomes.Multiple select question.freshwatermarinephotictropical