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Author Question: A swim bladder is a gas-filled sac that helps fish maintain buoyancy. The evolut (Read 936 times)

penguins

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on: Jul 12, 2013
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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Reply #1 on: Jul 13, 2013
I know it's B, we did this yesterday ;)


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penguins

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Reply #2 on: Jul 18, 2013
Thank you, thank you!!


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