Study "Evolution / Creationism" Essays 111-111

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Polymorphism Pertains to the Existence Term Paper

… Their beaks had evolved over time to be best suited to their function.

For example, in areas with many grubs, the finches who survived in greatest number were those with thin extended beaks. These birds could more easily poke their beaks into holes in the ground and extract the grubs. Finches with claw like beaks were less sucessful at this. But, they could more easily eat buds and fruit and could grind down their food, "giving them a selective advantage" in other natural circumstances where buds were the main food source for finches. (Biology Online, 2000)

Works Cited

Darwin, Charles. The Galapagos Islands. London, England; New York, NY: Penguin Books, 1995.

Darwin's Finches and Natural Selection. (2000) Biology Online. http://www.biology-online.org/pfriendly.htm?tutorial=15… [read more]

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