21. Evolution by Natural Selection
Descent with Modification
0:47 minutes
Problem 7c
Textbook Question
Textbook QuestionA swim bladder is a gas-filled sac that helps fish maintain buoyancy. Evidence indicates that early fish gulped air into primitive lungs, helping them survive in stagnant waters. The evolution of the swim bladder from lungs of an ancestral fish is an example of a. an evolutionary trend. b. paedomorphosis. c. the gradual refinement of a structure with the same function. d. exaptation.
Verified Solution
This video solution was recommended by our tutors as helpful for the problem above
Video duration:
47sPlay a video:
885
views
Was this helpful?
Related Videos
Related Practice
Showing 1 of 23 videos