On a small island in the north of Great Britain lives a population of peppered moths where there is very little industrial pollution, leaving most of the trees lightly colored. The island is far enough from the other islands that the moths do not fly between them. What could you about these two populations?
a) The population in the north should have a lower proportion of the light coloured morph than the population in the polluted area.
b) They may eventually become reproductively isolated.
c) They are different species.
d) Gene flow will enable the populations to exchange genetic material.