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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

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New Study Shows Animal Family Tree Looking Bushy in Places
Science, 23 Dec. 2005

A team of University of Wisconsin–Madison scientists suggests that a branch-by-branch account of animal relationships over a vast expanse of time is difficult to reconstruct because early animal evolution occurred in bunches.

» Read the full article

Active Reading Questions

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    According to your text, which of the following statements is true?
    a) Animals evolved much later than other groups of organisms.
    b) Animals evolved a high level of complexity.
    c) Animals fall within the larger grouping of Eukarya.
    d) all of the above
  2. fiogf49gjkf0d
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    Systematists are scientists who use a variety of techniques to resolve evolutionary relationships. The scientists in this article are attempting to use __________ evidence to resolve relationships among animals.
    a) fossil
    b) morphological
    c) DNA
    d) convergent characteristic
  3. fiogf49gjkf0d
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    Discuss how animals are similar to organisms in other kingdoms yet have characteristics that make them unique from other lifeforms.
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