Members of the Chondrichthyes had ancestors with dermal armor,but have a skeleton composed of _____________.
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Q36: The lateral-line system of sharks contains special
Q40: Sharks have
A)placoid scales.
B)ctenoid scales.
C)cycloid scales.
D)ganoid scales.
Q41: The ray-finned fishes belong to the Class
Q42: The gas gland of the advanced teleost
Q44: The gills of bony fishes are covered
Q46: The sarcopterygians are the sister group of
Q47: Fishes such as the Atlantic salmon that
Q48: Teleost fishes have a type of tail
Q49: Adult eels from both Europe and North
Q49: The _ hypothesis suggests that the vertebrae
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