Responses
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 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 interfered with melanin production causing lighter skin.
The exposure of human populations to new diseases common to the polar regions interfered with melanin production causing lighter skin.
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 less UV light required a reduction in melanin to produce more vitamin D for healthier bones.
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 predators only common to the polar regions caused them to adapt by camouflaging better with the environment.
1 answer
The best response is:
The exposure of human populations to less UV light required a reduction in melanin to produce more vitamin D for healthier bones.
This statement accurately explains why populations migrating away from the equator, where UV radiation is higher, would evolve lighter skin pigmentation. Less melanin allows for better synthesis of vitamin D in conditions with lower UV exposure, which is important for bone health.
