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Interlude A
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Interlude B
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Interlude C
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Interlude E

Biologists Uncover Darwin's Missing Evidence

Nature, 1 18 01

Biologists at the University of California–San Diego have demonstrated, in a study of the songs and genetics of a series of interbreeding populations of warblers in central Asia, how one species can diverge into two.

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Active Reading Questions

  1. The article discusses evolution in geographically isolated species. This discussion refers to ________________ speciation.
    a) allopatric
    b) sympatric
    c) incomplete
    d) convergent
  2. Scientists can always predict the rate at which new species will appear.
    a) true
    b) false
  3. What are ring species, and what do they have to do with allopatric speciation?
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