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Which is a characteristic feature of the members of the group Tunicata?

A.They regulate water with help of a siphon.
B.They have a tough calcium carbonate exoskeleton.
C. They feed on phytoplankton using tentacles.
D. They possess a water vascular system.

User Consejo
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The answer is B. They have a tough calcium carbonate exoskeleton.

User Jviotti
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