Before natural selection can operate upon a population, organisms within a species must show
A) reproductive incompatibility.
B) some variability.
C) the same genotype.
D) the same phenotype.

Question

Quizplus · Accepted Answer

Natural selection operates on the variability within a population, as it is the differences among individuals that can confer advantages or disadvantages in survival and reproduction. Without variability, there would be no basis for natural selection to act upon.

Before Natural Selection Can Operate Upon a Population, Organisms Within