Question

Which statement best explains how natural selection led to the adaptation of the Hudson River Atlantic tomcod fish?

Answer 1

Question:

Solution:

Remember that Natural selection is the process by which better-adapted organisms displace less-adapted ones through the slow accumulation of favorable genetic changes in the population over generations.

Now, according to the graph and the above information, in 2011, PCB-resistant fish greatly outnumbered fish with normal DNA. This suggests that the correct answer is:

Fish with PCB-resistant DNA survived to reproduce and pass on their genes in PCB-contaminated water, which increased its population.

So that, we can conclude that the correct answer is:

C.