Cartilaginous fish are characterized by _________.

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    a skeleton formed entirely of cartilage
    milk-producing mammary glands
    a three-chambered heart
    poorly developed lungs

asked May 30, 2013 in Biology by anonymous
    

1 Answer

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a skeleton formed entirely of cartilage
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)

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