Based on everything that you have learned so far, provide an explanation for how the different shades of skin color from pinkish white to dark brown evolved throughout human history.
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Based on everything that you have learned so far, provide an explanation for how the different shades of skin color from pinkish white to dark brown evolved throughout human history.
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- Explain the roles of Vitamin B and Vitamin D in the evolution of skin color. Use appropriate anthropological terms (such as "natural selection" and "phenotype") Be sure to discuss both Vitamin B folate and Vitamin D as they have different effects?How is the diversity in human skin color related to human environmental adaptation?Human populations living in countries in the northern latitudes, such as Finland, have a lighter complexion than people living in the tropical countries. What do you think is the reason for this difference?
- According to the video “The Biology of Skin Color”, how does UV exposure vary throughout the world? A. The UV rays are the same at the equator and the earth's poles B. There are higher UV rays near the equator and lower UV rays towards the north and south poles C. UV rays don't vary across the globe D. There are lower UV rays near the equator and higher UV rays towards the north and south polesoriginal Homo sapiens had black skin and why skin tones changed?According to the video “The Biology of Skin Color”, why is lighter skin needed in areas closer to the north and south poles where UV rays are weaker? A. Individuals with a lot of melanin would get too much UV ray penetration in their skin and they wouldn't be able to synthesize vitamin D. B. Lighter skin is not necessary in the north and south poles. C. Individuals with a lot of melanin wouldn't get enough UV ray penetration in their skin to synthesize vitamin B. D. Individuals with a lot of melanin wouldn't get enough UV ray penetration in their skin to synthesize vitamin D.
- What factors caused the correlation between the reduction in skin pigmentation in humans and migration of human populations away from the equator? The exposure of human populations to predators only common to the polar regions caused them to adapt by camouflaging better with the environment. The exposure of human populations to less UV light required a reduction in melanin to produce more vitamin D for healthier bones. The exposure of human populations to new sources of food common to the polar regions caused changes in physiology that resulted in the production of less melanin. The exposure of human populations to new diseases common to the polar regions interferred with melanin production causing lighter skin.So if skin color selection is not related to cancer, what accounts for the difference in skin color of different human populations? Meaning where is the selective pressure coming from to explain the differences in skin color?Which factors were determined to directly cause the loss of skin pigmentation in humans as a result of natural selection? the impact of UV radiation on folate and Vitamin D levels in human populations the clothing worn by humans in the early 8th century the interaction of human populations with predators in colder climates a change in the diet of human populations as they settled in colder climates
- Summarize how natural selection is the mechanism that produced a global cline of skin color. Your answer should include an explanation of therelationship between melanin, geography, UV radiation, folate, and vitamin D.Why is it that the evolution of skin color is considered a case of natural selection? Group of answer choices A- Because different alleles in skin color genes lead to differences in skin color B- Because differences in skin color lead to differences in number of children in different environments C- Both D- NeitherWhat is the evidence that the differences in skin color in populations around the world evolved by natural selection?