evolutionary biology - EvolutionaryBiology Componentsedit...

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Click to edit Master subtitle style Evolutionary Biology Components of the Theory
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Before Evolution n Aristotle (384-322 BCE) of Classical Greece and the “Great Chain of Being” (Scala Naturae) The Medieval Version
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Great Chain of Being implications n A place for everything and everything in its place; where you are is where you stay n The continuum implies that species are immutable n Things on the bottom are not as “good” as things on the “top” (e.g., higher animals vs. lower animals)
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n Charles Darwin (1809-1882) n Alfred Russel Wallace (1823-1913) Evolution’s founders
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The Winds of Change n "In October 1838, that is, fifteen months after I had begun my systematic inquiry, I happened to read for amusement Malthus on Population , and being well prepared to appreciate the struggle for existence which everywhere goes on from long- continued observation of the habits of animals and plants, it at once struck me that under these circumstances favourable variations would tend to be preserved, and unfavourable ones to be destroyed. The results of this would be the formation of a new species. Here, then I had at last got a theory by which to work". Charles Darwin, from his autobiography. (1876) Thomas Malthus: “Essay on the Principle of Population” (1798) (1766-1834)
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On the Origin of  Species by Means of  Natural Selection, or  the Preservation of  Favoured Races in the  Struggle for Life  (1859
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Evolution: Basics n The most basic definition is Charles Darwin’s in 1859: descent with modification . n Anyone can observe that parents have children (descent) who look different from them (modification). n Darwin extrapolated from this observation to claim that species likewise were connected by genealogy.
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Evolution basics n Overproduction-- Many more young are born than survive to adulthood (populations can grow exponentially). n
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This note was uploaded on 02/17/2011 for the course BIOLOGY 120 taught by Professor Fink during the Winter '11 term at University of Michigan.

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evolutionary biology - EvolutionaryBiology Componentsedit...

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