Arctic foxes typically have a white coat in the winter. In summer, when there is no snow on the ground, the foxes typically have a darker coat. Which of the following is most likely responsible for the seasonal change in coat color?
The lower temperatures in winter denature the pigment molecules in the arctic fox coat, causing the coat to become lighter in color
The decrease in the amount of daylight in winter causes a change in gene expression, which results in the foxes growing a lighter appearing coatCorrect
The diet of the foxes in summer lacks a particular nutrient, which causes the foxes to lose their white coat and grow a darker colored coat
Competition for mates in the spring causes each fox to increase its camouflage with the environment by producing a darker appearing coat