Looking at the evolutionary tree of modern humans, explain why African peoples are not a biological group. Would White (European). Native American and East Asian people be biological groups? What does this tree suggest about human diversity in Alrica? Below is an evolutionary 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 tree). 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 lineages (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 years ago. The other is a small group of people who left Africa and reached Europe by about 100.000 years ago..

1. Looking at the evolutionary tree of modern humans, explain why African peoples are not a
biological group. Would White (European). Native American and East Asian people be
biological groups? What does this tree suggest about human diversity in Alrica?
Below is an evolutionary 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 tree). 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 lineages (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 years ago. The other is a small group of
people who left Africa and reached Europe by about 100.000 years ago.