A defining characteristic of allopatric speciation is

A) the appearance of new species in the midst of old ones

B) asexually reproducing populations

C) geographic isolation

D) artificial selection

E) large populations

A rapid method of speciation that has been important in the history of flowering plants is

A) genetic drift

B) a mutation in the gene controlling the timing of flowering

C) behavioral isolation

D) polyploidy

Races of humans are unlikely to evolve extensive differences in the future for which of the following reasons?

I. The environment is unlikely to change

II. Human evolution is complete

III. The human races are incompletely isolated.

A) I only

B) III only

C) I and II only

D) II and III only

E) I, II, III