M Prep | MCAT 2015 Question of the Day - Prep, Practice Questions, and More!

Q:

The swim bladder is a structure in certain fishes which sits along the dorsal end of the fish is a gas-filled chamber used to help the fish regulate buoyancy but is not used for oxygenation of blood. This structure is evolutionarily homologous to the mammalian lung. Which of the following describes the relationship between the lung and the swim bladder?

A

divergent evolution

B

convergent evolution

C

parallel evolution

D

The two structures are not related by evolution.