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Darwin’s Finches
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On the Galapagos Islands in the Pacific Ocean lives thirteen different species of finches. Although not much to look at, these thirteen different species, sporting thirteen distinctly different beaks, provide proof of Darwin’s theory of evolution by natural selection. But how did these birds, once ....
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....oletis. These are a group of small flies whose larvae feed on developing fruit. The Rhagoletis pomonella is a species that feeds on hawthorns. These flies then found a new niche and began feeding on apples in orchards located in Massachusetts and Connecticut. There are now two species of the Rhagoletis pomonella. Reproductively isolated by their mating behavior.
These two modes of speciation are the basis of Lack’s ideas of the Theory of the Speciation of Darwin’s Finches. He argues that the .... |
| Number of words: 964 |
Approximate pages: 4 |
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