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Why do most human bodies tan when exposed to UV light? Explain the possible relationships between...

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Biology

Why do most human bodies tan when exposed to UV light? Explainthe possible relationships between ultraviolet light, vitamin D,folic acid and melanin production with regard to the evolution ofvarious skin colors in human population

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Exposure to ultraviolet rays causes certain skin cells to produce the pigment melanin which darkens through oxidation There is the general trend of populations becoming lighter    See Answer
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