Question

How have the historic levels of melanin in human populations changed due to migration? (1 point)
Responses

Humans that produced less melanin became more common as populations migrated away from the equator.


Humans that produced less melanin became more common as populations migrated toward the equator.
Humans that produced less melanin became more common as populations migrated toward the equator.

Humans that produced more melanin became more common as populations migrated toward the equator.
Humans that produced more melanin became more common as populations migrated toward the equator.

Humans that produced more melanin became more common as populations migrated away from the equator.

Answer 1

The answer is "Humans that produced more melanin became more common as populations migrated toward the equator." Melanin is a pigment that helps protect the skin from UV radiation. As populations migrated closer to the equator where UV radiation is stronger, natural selection favored individuals with more melanin to better protect their skin. Conversely, as populations moved away from the equator, there was less selective pressure for increased melanin production, leading to a decrease in melanin levels.