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Unit 1:
Ch. 1
Ch. 2
Ch. 3
Interlude A
Unit 2:
Ch. 4
Ch. 5
Ch. 6
Ch. 7
Ch. 8
Ch. 9
Interlude B
Unit 3:
Ch. 10
Ch. 11
Ch. 12
Ch. 13
Ch. 14
Ch. 15
Interlude C
Unit 4:
Ch. 16
Ch. 17
Ch. 18
Ch. 19
Interlude D
Unit 5:
Ch. 20
Ch. 21
Ch. 22
Ch. 23
Ch. 24
Ch. 25
Ch. 26
Ch. 27
Ch. 28
Ch. 29
Ch. 30
Interlude E
Unit 6:
Ch. 31
Ch. 32
Interlude F
Unit 7:
Ch. 33
Ch. 34
Ch. 35
Ch. 36
Ch. 37
Ch. 38
Interlude G

Humans Had Brush with Extinction

A new report in the April 27 issue of the Proceedings of the National Academy of Sciences by evolutionary biologists at the University of California, San Diego shows that the history of humans is quite different from that of chimpanzees, bonobos, and gorillas and supports with genetics the controversial idea that humans have had at least one dramatic population reduction during the last million years.

» Read the full article

Active Reading Questions

  1. fiogf49gjkf0d
    Of chimpanzees, bonobos, gorillas, and humans, ___________ have the least amount of genetic variability.
    a) chimpanzees
    b) bonobos
    c) gorillas
    d) humans
  2. fiogf49gjkf0d
    Which of the following are factors that would reduce the amount of genetic diversity in a species?
    a) reduction in the number of individuals in a species
    b) inbreeding within a species
    c) genetic drift
    d) all of the above
  3. fiogf49gjkf0d
    Humans are occasionally thought to be “immune” to natural selection. Using this article and your text, show how humans have evolved due to natural selection.
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