The Swim Bladder of Ray-Finned Fishes

question 82

Multiple Choice

The swim bladder of ray-finned fishes

• A) was probably modified from simple lungs of chondrichthyans.
• B) developed into lungs in saltwater fishes.
• C) first appeared in sharks.
• D) provides for regulation of buoyancy.
• E) Two of the options listed are correct.

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