Mention tswo distinguishing features of echinodermata
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1) They all possess five-part radial symmetry around a central disk. 2)They all possess a very unique water vascular system (vascular system based on water). These unique characteristics distinguish echinoderms from other animals in the animal kingdom.
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1)They are marine and free-living.2)They are triploblastic and have a coelomic cavity.
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