A population of deer mice with light-colored fur lives in Sand Hills, Nebraska.
The ground in Sand Hills is light colored where glaciers have deposited sand
on top of dark soil. In contrast, areas outside Sand Hills have dark soil and
dark-furred mice. How did the mice in Sand Hills come to have light-colored
fur?
A. Mice are able to change their fur color at will.
B. Light-colored sand caused a mutation for lighter fur color in the
mice.
C. Mice with light-colored fur were selected for in the sandy
environment.
D. Mice learned how to change their fur to a lighter color.

Being of the same color as the substrate provides animals selective advantages. Option C. Mice with light-colored fur were selected for in the sandy environment

What is selective advantage?

Selective advantages are all the characteristics of organisms that make them better for living, surviving, and reproducing than other organisms under the same environmental pressures.

Selective advantages are the base of evolution by natural selection.

What is natural selection?

Natural selection selects beneficial alleles and increases their frequency in the population.

Natural selection favors an allele or act against it. It depends on how the allele affects the fitness of individuals.

The phenotype that expresses the best fitness results in higher survival, fertility, and reproductive rates. Aptitude -fitness- must be significant to the natural selection act in its favor.

Adaptation, acchieved by natural selection, is closely related to selective pressures.

Selective pressure is applied by different organisms or conditions that influence the survival rate of a certain phenotype. It influences the probability of a genotype leaving its gametes to the following generations.

In the exposed example, the sand color is acting as the selective pressure that models the color of the mice's fur. Being light provided selective advantages to the mice population living in Sand Hills.

The light colors of Sand Hills are the environmental condition favoring the same Light-colored phenotype.

The correct option is C. Mice with light-colored fur were selected for in the sandy environment.

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