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Interlude A
Unit 2:
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Interlude B
Unit 3:
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Interlude C
Unit 4:
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Interlude E

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

  1. 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. 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. Discuss how animals are similar to organisms in other kingdoms yet have characteristics that make them unique from other lifeforms.
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