PART 2 (continued) Watch the film The Biology of Skin Colorhttp://wwww stamp 12:

Question

PART 2 (continued) Watch the film The Biology of Skin Colorhttp://wwww stamp 12:19 minutes to 13:32 minutes. Pause when Dr. Jablonski says, "That is what melanin does In this segment of the film, Dr. Jablonski references a paper she had read about the connection between UNv exposure and the essential nutrient folate (a B vitamin), which circulates throughout the body in the blood The paper, published in 1978, describes how the serum (blood) folate concentrations differed between two groups of light-skinned people. You will now look at one of the figures from that paper Examine Figure 3 and answer Questions 14-17 Figure 3. Folate Levels in Two Groups of People. exposed to intense UV light for at least 30-60 minutes once or twice a week for three months Sixty-four individuals not receiving this treatement normals') served as the control group. The difference between the two groups was statistically significant (p

Explanation / Answer

Ans-14 the UV exposure is indirectly proportional to the values of folate in skin. A prolonged UV exposure reduce the folate levels.

Ans-15 eureka moment is the moment in when a person solve the previous unsolvable puzzle or in other words when we become clear about something for which we were having conflict.

Ans-16 the new revised hypothesis should be that a prolonged exposure of skin to UV maintain a selective pressure upon the skin and make skin colour dark.

Ans-17 no this is not enough to understand the whole variation among the human Because there are several other reason upon which the skin color is dependent.

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