Responses
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 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 predators only common to the polar regions caused them to adapt by camouflaging better with the environment.
1 answer
The most accurate 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 explanation correctly highlights the importance of UV light for vitamin D synthesis in the skin, which is crucial for bone health. As human populations migrated away from the equator to areas with less sunlight, lighter skin allowed for more efficient production of vitamin D in these environments.
