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Echnodermata joined appendages meaning

Answer»

stars and brittle stars, the skeleton consists of MULTITUDES of small CALCAREOUS plates called 'ossicles' that MOVE with one another, forming flexible joints. ... In sea cucumbers, the calcareous plates have degenerated and are buried in the fleshy body. Some echinoderms are carnivorous and scavenge the ocean FLOOR.



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