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Author Question: The swim bladder of ray-finned fishes A) was probably modified from simple lungs (Read 657 times)

federox

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on: Aug 8, 2013
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.


theo

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Reply #1 on: Aug 10, 2013
Answer has to be D, trust me!


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