Evolution of Skin Color in Humans: Nina's Investigation
Understanding Skin Color Evolution in Humans
The condition that Nina is investigating is the evolution of skin color in humans.
The study of human biological variation shows that skin color shifts gradually with location. It is an evolutionary adaptation to different levels of exposure to ultraviolet rays from the sun.
The traditional theory, known as directional selection, explains that darker-skinned people had an evolutionary advantage over lighter-skinned people in sunny regions, while lighter skin provided an advantage in sunlight-deprived areas like northern Europe.
Final answer:
Nina is investigating the evolution of skin color in humans, which is an evolutionary adaptation to different levels of sun exposure.
Explanation:
The condition that Nina is investigating is the evolution of skin color in humans.
The study of human biological variation shows that skin color shifts gradually with location. It is an evolutionary adaptation to different levels of exposure to ultraviolet rays from the sun.
The traditional theory, known as directional selection, explains that darker-skinned people had an evolutionary advantage over lighter-skinned people in sunny regions, while lighter skin provided an advantage in sunlight-deprived areas like northern Europe.