PLZZZ HELP ME A large population of ground squirrels were separated over time by the Grand Canyon, eventually creating two new species.

Giraffes with longer necks are able to reach more food, live longer, and pass on long necks to more babies.

Arctic foxes have developed two-layered fur coats; a white layer for the extra cold winters and a thinner, brown layer for the short summers.

A flood washes away most of a population of field mice. Only those who lived in the roots of trees survived to pass on their genes.

UV radiation causes a mistake in a gene; changing one letter in the DNA code and causing a new eye color.

1.
Natural Selection

2.
Mutation

3.
Adaptation

4.
Genetic Drift

5.
Evolution