Author Question: A swim bladder is a gas-filled sac that helps fish maintain buoyancy. The evolut (Read 933 times)

penguins

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A swim bladder is a gas-filled sac that helps fish maintain buoyancy. The evolution of the swim bladder from lungs of an ancestral fish is an example of
A) an evolutionary trend.
B) exaptation.
C) changes in Hox gene expression.
D) paedomorphosis.
E) adaptive radiation.



Millan

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I know it's B, we did this yesterday ;)



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