Theodosius Dobszhansky once said, “Nothing in biology makes
any sense except in the light of evolution.” Now, old Theodosius
never had to take the SAT II Biology test, but if he had, he probably
would have been quite pleased about the many questions the SAT II
asks about evolution and the diversity of species. About 15 percent of
the questions in the core of the SAT II Biology E/M test evolution
or diversity in some way, and the E and M sections cover ecology
and molecular biology, respectively, in the context of evolution.
But there is good news: evolution is not such a difficult
concept. In fact, its beauty is that it is such an elegant, simple
theory. And getting a handle on the classification of the species
is largely a matter of memorization.