A population of insects has a brown color, providing them with camouflage on the desert sands where they live. Over thousands of
years, climate changes in the area cause grasses to grow, and the population of insects becomes green over the same period of time. Which term describes what has taken place in the population of insects? a. mutation
b. evolution
c. migration
d. variation
Evolution is a change in the gene pool of a population over time. It occurs throughout the whole population. The gene pool in this situation changes from consisting of genes for mostly brown-colored insects to green. Mutation only occurs in individuals. Migration refers to population moving locations. Variation is just the different genes in a gene pool.
