In Some Instances Environmental Change Causes a Situation Where One

Multiple Choice

In some instances environmental change causes a situation where one phenotype is favored for a period of time,and then a different phenotype is favored.This oscillating selection causes

A) the maintenance of genetic variation in the population.
B) elimination of rarer genotypes because of uneven selection.
C) an increase in point mutations.
D) high population increase to maintain phenotypic variation.
E) extinction of the population.