The Arctic fox is specifically made to survive extreme cold weathers, it has a very thick fur coat that keeps it very warm. Also, Arctic foxes change the color of their fur with the seasons. In winter they are white to blend in with the snow, while in the summer they change to brown. Hope this helps.
The answer is mutations in a gamete, I believe.
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Protoplasm is the organic substance making up the cell of all living things
Color change, gas released, volume change, temp change
