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North American gray wolves usually have mixed gray and white fur, but some members of the species have a version of a gene, or gene variant, that gives them a mostly black coat instead. Sarah Cubaynes and her team studied twelve populations of North American gray wolves. They found that the black-furred wolves are more common in areas where outbreaks of distemper virus happen regularly. The team also discovered that the black-furred wolves are more likely to be immune to distemper than the gray-furred wolves are. Taken together, these findings suggest that

Which choice most logically completes the text?

A. gray-furred wolves will soon replace black-furred wolves across North America.
B. the gene variant that results in black fur may be linked to immunity to the distemper virus.
C. North American gray wolves experience more outbreaks of distemper virus than other wolf species do.
D. the average life span of gray wolves is likely to increase over time because of a particular gene variant.

Answer :

Final answer:

The findings suggest that the gene variant leading to black fur may provide an adaptive advantage by being linked to immunity to the distemper virus, indicating a case of natural selection in North American gray wolves. The Correct Answer is Option.B.

Explanation:

The study of Sarah Cubaynes and her team suggests that the gene variant that results in black fur may be linked to immunity to the distemper virus.

This correlation was observed in North American gray wolves, where black-furred wolves were found more commonly in areas with frequent distemper virus outbreaks and were more likely to be immune to the disease.

These findings point towards a possible adaptive advantage of the black fur gene variant in areas affected by the virus, suggesting that it could be an example of natural selection acting on wolf populations.

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Rewritten by : Barada

The research findings suggest that the gene variant causing black fur in North American gray wolves may be associated with immunity to distemper, and such wolves are more common in areas with regular distemper outbreaks.

The findings of Sarah Cubaynes and her team suggest that the gene variant that results in black fur may be linked to immunity to the distemper virus. In areas where distemper outbreaks are common, black-furred wolves are more prevalent and have a higher likelihood of being immune than their gray-furred counterparts. This correlation implies a potential adaptive advantage for the black-furred gene variant in conferring resistance to distemper, influencing the population genetics of North American gray wolves over time. Through the process of natural selection, the beneficial gene variant may increase in frequency within affected populations since individuals with this trait have better survival and reproductive success in environments with frequent distemper outbreaks.