3. What does this tree suggest about human diversity in Africa? Below is an cvolutionary tree of humans. The figure shows time from the bottom (about 200,000 years ago) to today (at the top). Notice that humans existed in Africa for 100.000 years before migrating to other parts of the world. There are many lineages of humans in Africa (all the initial offshoots or lineages of the human family treel and thus great genetic diversity. The groups that left Africa have less genetic diversity because they originated as small groups of people who had only a subset of human genetic diversity. The tree consists of a set of lincages (groups of people descended from a common ancestral population). A lineage is a biological group-a group composed of a common ancestor and all its descendants. Each branch point represents a common ancestor for the two lineages that diverge from that point. Two important common ancestors are highlighted: the common ancestor of all modern humans, which was most likely a population of around 10,000 individuals who lived about 200,000 vears ago. The other is a small group of people who left Africa and reached Europe by about 100,000 years ago. Looking at the evolutionary tree of modem humans, explain why African peoples are not a biological group. Would White (European), Native American and East Asian people be biolopical groups? What does this tree sugest about human diversity in Africa?.