Select the Statement That Correctly Describes Why Human Populations That

question 12

Multiple Choice

Select the statement that correctly describes why human populations that moved north out of Africa developed lighter skin.

• A) Lighter skin allows for more efficient folate production in the low-level UV light of the north,and vitamin D production is also increased in the low levels of UV light.
• B) The low-level UV light of the north is absorbed more efficiently by lighter skin,preventing overproduction of vitamin D and allowing folate to be produced at sufficient levels.
• C) Lighter skin allows absorption of the high-level UV light of the north for sufficient vitamin D production,and folate production,in turn,is enhanced in the presence of vitamin D.
• D) Lighter skin protects humans from the high-level UV light of the north such that both vitamin D production is sufficient and folate levels are protected for normal cell function.
• E) In the low-level UV light of the north,vitamin D production is insufficient with darker skin,and folate is not destroyed by the low levels of UV light,even with lighter skin.

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