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12.3: Reading: Echinoderms - Biology

Phylum: EchinodermataReadingEchinoderms are coelomate, and deuterostomes.Echinoderms include sea stars (starfishes), sea urchins, sand dollars, sea cucumbers, and sea lilies. There are 6,000 species of echinoderms; they are all marine.Although echinoderm adults have radial symmetry, they evolved from ancestors that were bilaterally symmetrical.
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