Examlex
Which method of obtaining a response is best for questions that may need explaining or when respondents need to explain their answers?
Hydrozoans
Members of a class of predominantly marine animals in the phylum Cnidaria, which includes the Portuguese man-of-war, certain jellyfish, and hydra.
Ctenophores
A phylum of marine animals known as comb jellies, characterized by their gelatinous bodies and rows of ciliary plates for movement.
Flatworms
A group of invertebrates belonging to the phylum Platyhelminthes, known for their flattened bodies and lack of specialized respiratory and circulatory systems.
Acoelomate
An animal lacking a body cavity (coelom). Compare with coelomate and pseudocoelomate.
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