The wing color of a population of moths darkens over time. Which statement best explains why the wing color changes?

A. An excess of smoke in the atmosphere caused the wings to darken.

B. A decreased amount of water in the area caused the wings to darken.

C. The frequencies of alleles for light wings were increased in the moth population.

D. The frequencies of alleles for dark wings were increased in the moth population.

Question

19-07-2024
Biology

College

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The wing color of a population of moths darkens over time. Which statement best explains why the wing color changes?

A. An excess of smoke in the atmosphere caused the wings to darken.

B. A decreased amount of water in the area caused the wings to darken.

C. The frequencies of alleles for light wings were increased in the moth population.

D. The frequencies of alleles for dark wings were increased in the moth population.

Answer :

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Final answer:

The wing color of moths darkens over time due to an increase in the frequency of alleles for darker wings in the population. This change may be advantageous for survival in a darker environment.

Explanation:

The correct answer is OC. The frequencies of alleles for light wings was increased in the moth population.

Wing color in moths is primarily determined by the presence or absence of certain alleles (different forms of a gene). In this case, the population of moths experienced an increase in the frequency of alleles for darker wings. This change in allele frequencies could be due to various factors, including natural selection.

For example, if the environment where the moths live becomes darker or polluted, moths with darker wings may have a better chance of survival, as they are able to blend in with their surroundings and avoid predation. Over time, these moths would reproduce more successfully and pass on the genes for darker wings to future generations, leading to an overall darkening of the wing color in the population.

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