The chimaeras
A) include representatives called ratfish and rabbitfish.
B) have an odd mixture of shark-like and bony-fish-like characteristics.
C) were once much more common than they are now.
D) all of these
Correct Answer:
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Q30: The lungfishes
A)are all extinct.
B)do not really have
Q31: The _ is composed of vertebrates having
Q32: Hagfishes
A)are entirely freshwater animals.
B)are parasitic.
C)belong to the
Q33: The function of the spiracle in the
Q34: The mechanism whereby buoyancy is achieved in
Q36: The fisheries of the Great Lakes were
Q37: The ammocoetes is the larval form of
Q38: Unlike other vertebrates,the body fluids of hagfishes
Q39: The _ is composed of vertebrates having
Q40: Sharks have
A)placoid scales.
B)ctenoid scales.
C)cycloid scales.
D)ganoid scales.
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