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1 vote
Although they are members of the bilaterian clade, sea stars have a pentaradial symmetry in the adult life stage. They move around (and open their prey) by sucking water up through their tube feet and sending it through canals in their arms. This movement of water is finely controlled by the valve on top (madreporite). The closest cousins of the sea stars are: _________

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5 votes

Answer:

The closest cousins of the sea stars are: sand dollars, sea cucumbers, sea urchins

answered
User JeromeFr
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