How many people most likely represents a snapshot in time of a human society that existed 12,000 years ago?

What does all of the organ system in a human form

The cluster of developing cells from conception until birth is called an

Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. who is correct? a. sarah is correct because genetic diversity occurs over a long period of time. b. john is correct because genetic diversity occurs immediately. c. both are correct because genetic variation can occur or long period of time. d. neither are correct because genetic diversity occurs over any period of time