People living in equatorial countries have a darker skin tone than others. what would be the reason for this change in skin tone?
a. the ancestors of the people living in equatorial countries must have undergone a mutation for protection from malarial parasites and therefore evolved a darker skin tone.
b. the ancestors of the people living in equatorial countries must have undergone evolutionary adaptation for protection from harmful uv rays that fall straight on the equator.
c. people living in equatorial countries develop a darker skin tone due to the exposure to harmful ir rays falling straight on the equator, which damages their skin.

The correct answer is B. The ancestors of people who live in equatorial countries should have undergone evolutionary adaptation reason being because of protection from harmful UV rays which falls straight from the equator.

People who live in equatorial countries they are known to have dark skin tone more than others because of their ancestors who underwent evolution adaptation which was to protect from harmful UV rays which comes directly from the equator.

Majority of people who lives in the equator in Africa are bantus.

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?