Darker skin is more prevalent among indigenous people living in areas with high amounts of UV radiation. Nina Jablonski proposed a hypothesis to explain the selective pressure for darker skin in these environments. On which of the following observations did she base this hypothesis?
A) The melanin in darkly pigmented skin protects cells from UV radiation, which can cause skin cancer
B) The larger amount of melanin in darkly pigmented skin protects circulating folate from being destroyed by UV radiation
C) In general, people with darker skin have lower amounts of folate
D) Human populations have different versions of the MC1R gene
Answer: B) The larger amount of melanin in darkly pigmented skin protects circulating folate from being destroyed by UV radiation
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