Bony fishes possess two features not found in other fish. Select the best choice from those listed below to complete the following sentence. Bony fishes have

A. swim bladders and movable jaws.
B. swim bladders and a closed circulatory system.
C. swim bladders and a complete digestive system.
D. swim bladders and gill covers called opercula.


Answer: D

Biology & Microbiology

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