Question

The results of various DNA studies indicate that traits such as skin color are more diverse in sub-Saharan Africa than anywhere else. This supports the idea that Homo sapiens evolved in Africa because:
a) other Homo species, such as Homo erectus, arriving in Africa would have brought features with them
b) Homo sapiens would have spent very little time in Africa before moving out to other areas, so that a population bottleneck would have occurred
c) Homo sapiens would have had a longer connection to Africa and so there was more time for random mutations in such features to occur
d) the environmental conditions of sub-Saharan Africa are such that they promote rapid evolutionary change, a situation not found elsewhere in the world
e) these traits appear to have come from the Neanderthals, and humans and Neanderthals only mixed in Africa

Answer

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