Human populations in low-uv environments tend to have more lightly pigmented skin. one explanation is that the selective pressure for dark skin decreases as uv intensity decreases. at the same time there is selection for lighter skin to absorb more uv radiation, which is needed for vitamin d production. what evidence supports the vitamin d hypothesis for the evolution of lighter skin tones?

QUESTION POSTED AT 01/06/2020 - 12:38 PM

Answered by admin AT 01/06/2020 - 12:38 PM

The prevalence of lighter skin tones of peoples indigenous to non-equatorial regions of Earth, where light intensity is much less
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