CAMPBELL BIOLOGY IN FOCUS-TEXT,AP ED.
CAMPBELL BIOLOGY IN FOCUS-TEXT,AP ED.
3rd Edition
ISBN: 9780136811206
Author: Urry
Publisher: SAVVAS L
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Chapter 23, Problem 5TYU

A swim bladder is a gas-filled sac that helps fish maintain buoyancy. The evolution of the swim bladder from the air-breathing organ (a simple lung) of an ancestral fish is an example of

  1. A.    exaptation.
  2. B.     changes in Hox gene expression.
  3. C.     paedomorphosis.
  4. D.    adaptive radiation.
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From Sea to Changing Sea | Early Life in the Oceans || Radcliffe Institute; Author: Harvard University;https://www.youtube.com/watch?v=Ac0TmDf5Feo;License: Standard youtube license