Solved: A swim bladder is a gas-filled sac that helps fish
Chapter 0, Problem 7(choose chapter or problem)
A swim bladder is a gas-filled sac that helps fish maintain buoyancy. The evolution ofthe swim bladder from lungs of an ancestral fish is an example of a. an evolutionary trend. d. paedomorphosis. b. exaptation. e. adaptive radiation. c. changes in Hox gene expression.
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