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Biology 20 Online
OpenStudy (anonymous):

A snail’s shell is formed from its ________. A.mantle B.foot C.radula D.notochord

OpenStudy (anonymous):

I'm going to go with radula. Notochord should be neuro, foot is the attachment to the outside world, and for some reason I think the mantle is also related to the outside/foot. I'm googling now: Nooooo! I am wrong! "The outer edge of its mantle continuously adds new shell at this opening. " It's the mantle. http://www.scientificamerican.com/article.cfm?id=how-are-seashells-created

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