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OpenStudy (anonymous):
What is the common name of the group whose members are characterized by exoskeletons and a unique water vascular system? A. brachiopods B. medusas C. echinoderms D. tunicates
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OpenStudy (anonymous):
I will medal and fan
OpenStudy (anonymous):
i believe it is echinoderms because that would include star fish which obviously have an exoskeleton for protection but they also have a pretty fancy water vascular system that is used for locomotion, feeding, respiration and excretion
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