How does skin cancer not exert enough evolutionary pressure to account for darker skin in humans? 2. How does folate deficiency exert enough evolutionary pressure to account for darker skin in humans? 3. What is one indispensable function of UVB rays in the human body" How does this exert evolutionary pressure on human skin color? Briefly describe the 2 reasons why the Inuit people exhibit somewhat darker skin levels than would be predicted given the UV levels at their latitude_ 5. What theory do the authors propose for why women generally have lighter skin than men? 6. Briefly explain why skin color is described as "one of the least useful characteristics in determining the evolutionary relations between human groups"
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Skin cancer does not exert enough evolutionary pressure to account for darker skin in humans because skin cancer typically develops later in life, after individuals have already reproduced and passed on their genes. Therefore, it does not have a significant impact Show more…
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1. Scientists have argued for many years that skin cancer was an evolutionary driver that enforced the predominance of dark-skin individuals in areas with high levels of sun exposure. Dark skin does reduce the chance of getting skin cancer, but studies have shown that skin cancer often occurs after individuals are 45 years old. Given the information provided above, could skin cancer explain the high selective pressure for dark skin in areas with high doses of sun exposure? Briefly explain.
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