1) "I am spiny skinned, free living marine animal, I have peculiar water driven tube system and hard calcium carbonate structures which I use as skeleton" Who am I? which class do I belong to?
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1) "I am spiny skinned, free living marine animal, I have peculiar water driven tube system and hard calcium carbonate structures which I use as skeleton" Who am I? which class do I belong to?
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Answer:
Snail and it belongs to the class Gastropoda.
Answer:
Star fish, sea cucumber, sea urchins, snail