Which phylum is found exclusively in marine habitats?

a. Mollusca
b. Arthropoda
c. Echinodermata
d. Annelida


ANS: C
The 6,000 species of echinoderms all live in marine habitats. They have no eyes or brains and are
radially symmetrical. Their symmetry is in a five-sectioned body plans. This phylum includes sea
stars, sea urchins, and sand dollars. Information can be found in the section Advanced Invertebrates
Have Complex Bodies and Internal Systems

Environmental & Atmospheric Sciences

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What will be an ideal response?

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