|Passage IV||Column 2 heading|
The passage indicates that female eels’ pupils expand and turn blue because the eels:
F. must adapt to see in an environment with much less light than they are used to.
G. are about to undergo a change in their blood chemistry.
H. no longer need to be able to recognize food sources since they have stopped eating.
J. need to be able to recognize the male eels that will fertilize their eggs.