8 Which best illustrates the relationship between variations within a population and natural selec-
tion?
A Natural selection acts upon a population since
all members of the population are identical.
B Organisms are able to change their genetic
makeup to best adapt to a changing external
environment.
C Giraffes have long necks and legs from
stretching to reach food in trees. This trait was
then passed to their offspring.
D Antelopes with muscular legs are able to
outrun their predators better than antelopes
with poor muscle tone. Thus they lived to
reproduce.