New species form:
when subspecies diverge more and more
because of natural selection
when members of the same species become adapted to new environments
all of the above
13.
Random changes in allele frequency in a population are called:
gene flow
genetic drift
microevolution
stabilizing selection
14.
The finches that Darwin studied differed in the shape of their beaks. According to Darwin, the finches probably:
all had a common ancestor
were born with identical beaks
were descended from similar birds in Africa
ate the same diet