This paper discusses various theories of evolution, then focuses on Charles Darwin's theory. Specifically, the paper explores how his idea of natural selection fits into the scheme of species development.
Written in 2002; 2,388 words; 7 sources; MLA; $ 73.95
Paper Summary:
The writer explores the topic of species development and the ways in which different theories of evolution have arisen from different mechanisms proposed to be behind the changes in species. Darwin's theory of natural selection answers the question of species develop over time.
Table of Contents:
Introduction
Various Historical Theories
Darwinian Evolution
Variation
Natural Selection
Survival of the Fittest
Difficulties of Darwin's Theory
Conclusions
From the Paper:
"Darwin based his natural selection on the idea that if there were no checking factor, all organisms have to potential to breed their population to quantities that vastly outweigh the numbers actually seen. Since this does not happen, there must exist some factor that limits the population of the species. He explains, in depth, the geometric progression of population growth. Perhaps the most basic example is that of bacteria; each bacteria can divide into two identical bacteria in a matter of hours. We would start with one, which would divide into two, which would divide into four and so one. In a matter of days, millions of bacteria would exist. Animals and plants have the ability to breed in a similar geometric fashion. Yet something keeps populations in check. There are a myriad of reason why a population would be kept in check. The overall title to these checks Darwin assigned was Natural Selection."
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