Question

● Select the statements that describe relationships between UV light, melanin, folate, and vitamin D. Select the Two answers that are correct. High levels of UV light select for a decrease in melanin UV light is necessary for the production of vitamin D The absorption of UV light protects folate from destruction. Vitamin D production is promoted with higher melanin levels Melanin in the skin shields folate from destruction by sunlight. 2. Select the statement that correctly describes why human populations that moved north out of Africa developed lighter skin. O 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. 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. O 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. 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. O 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.

Answer 1

Q.1

Answer:

UV light is necessary for the production of Vitamin D.

Melanin in the skin shields folate from destruction by sunlight.

Explanation:

Higher level of melanin in the skin acts as a shield against UV rays. Hence Folate degradation can be prevented, at the same time Vitamin D production is balanced.

Q.2

Answer: In the low-level of 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.

Explanation: Northern side has low light (UV ray). With darker skin in the northern side it is difficult to produce enough vitamin D because of the presence of melanin which prevents the degradation of folate by the UV light