Allele Frequencies Can Change Across the Geographic Range of a Species

Multiple Choice

Allele frequencies can change across the geographic range of a species according to climate,geological features,or direction in the range.For instance,a certain allele frequency might go up along with the elevation or down as you go south in the species' range.This systematic change in frequency is referred to as

A) genetic drift.
B) q².
C) directional selection.
D) a cline.
E) heterosis.