Humans are triploblastic animals, meaning they have _______  during the embryonic phase

Africa has a higher degree of human genetic diversity than any other continent. This is consistent with the theory that modern humans have their origin in Africa. A small part of the population migrated out of Africa and reached new locations where they established their own population with lower genetic variability. This is an example of the:

What is the earliest observed difference between humans and their close relatives: the great apes?

Why might a molecular clock based solely on neutral mutations be more reliable than one incorporating adaptive mutations?

Which statement accurately defines 'fitness' in the context of evolution?