Which characteristics of the skeleton of members of phylum echinodermata is unique compared to the typical skeletons of members of clade protostomia? echinoderms have a hard, calcareous skeleton. echinoderms have an internal skeleton. the skeleton of echinoderms provides body rigidity. the skeleton of echinoderms is not molted?
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Which characteristics of the skeleton of members of phylum echinodermata is unique compared to the t...
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