A single species of squirrel evolved over time into two species, each on opposite sides of the Grand Canyon. This change was most likely due to

A higher mutation rates on one side.

B low genetic diversity in the initial population.

C the isolation of the two groups.
D differences in reproductive rates.

Question

A single species of squirrel evolved over time into two species, each on opposite sides of the Grand Canyon. This change was most likely due to 
 
 
    A     higher mutation rates on one side. 
 
    B     low genetic diversity in the initial population. 
 
    C     the isolation of the two groups.  
    D     differences in reproductive rates.

azureilai · Answer

C. because the species are isolated, their two gene pools are less likely to intermix, and theory of evolution states that the species will become more diverse.