Question

All of the following EXCEPT the resistance of _________ demonstrate artificially selected resistance.

Answer 1

All of the following EXCEPT the resistance of _________ demonstrate artificially selected resistance.

The resistance of Antarctic fish to freezing, due to anti-freeze proteins in their blood.

Answer 2

The resistance of Antarctic fish to freezing, due to antifreeze proteins in their blood. This is the only answer choice where natural selection is working, and not artificial selection by human means.