Darwin Paper - Michael Lepri Prof. Saltzman Nat Science Feb...

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Michael Lepri Prof. Saltzman Nat Science Feb 1, 2009 Darwin’s unpublished Work on Species Darwin describes the process of natural selection using a quote from De Candolle who declares that “all nature is at war.” Darwin explains that it is difficult to tell that these changes or “adaptations” are going on. For animals, food must be constant in order to create an environment where their population can continue to grow at an equal pace. Environmental changes also effect certain animal populations. Darwin uses the example of the increase in the number of mice in La Plata during a drought. The number of cattle in the region dramatically decreased at the same time. It was concluded by Darwin that mice must have lived longer during a drought. In order for there to be a substantial increase there would only have to be a greater number surviving their first year of life to allow them to begin to reproduce. Darwin states that it is normally under unusual circumstances like cold, hot, dry
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This note was uploaded on 12/03/2009 for the course HIST 101 taught by Professor Bullard during the Spring '08 term at Fairleigh Dickinson.

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Darwin Paper - Michael Lepri Prof. Saltzman Nat Science Feb...

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