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Multiple Choice
A) air intake for respiration.
B) water intake to prevent clogging the gills.
C) detection of bioelectric fields from prey buried in the sea bottom.
D) detection of chemical odors in the water.
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Multiple Choice
A) include representatives called ratfish and ghostfish.
B) have an odd mixture of shark-like and their own unique characteristics.
C) were more common in the Cretaceous than they are now.
D) have the upper jaw fused to the cranium.
E) All of the choices are correct
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