The Theory of Evolution Essays

760 Words May 24th, 2008 4 Pages
Running Head: EVOLUTION

The Theory of Evolution
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Charles Darwin’s theory of evolution has been a topic of controversy since it was promulgated in the late 1800s. Nonetheless, its tenets remain strong, with many modern day scientists making discoveries that support Darwin’s theories of evolution, natural selection, and survival of the fittest.
In The Origin of Species, Darwin calls the process of natural selection or survival of the fittest, the preservation of favorable individual differences and variations, and the destruction of those, which are injurious (Darwin, 1901). Darwin’s theory of evolutionary change and process of natural selection surmises that variations exist in every
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This stress response filled the human body with strength, stamina, and speed to escape a hazardous situation, and those who fought and won, or fled and lived, were the fittest and survived. In Western civilization today, this response is no longer needed for survival, however, the body still responds to stressors with this “fight or flight” response (Beecher-Monas & Garcia-Rill, 2006). Therefore, the behavior this response is meant to coincide with has evolved into one in which modern day stress is the “predator”, rather than a wild animal or a competing tribe.
The fossil record has been used by scientists to support Darwin’s theory, which provides evidence of change over time “of descent and modification” (“Science”, 2007). Common animal structures have also support evolution by using comparative anatomy to show common ancestral traits through stages of transition. The science of biogeography has examined living species and compared them to local fossils to determine whether they are similar in structure, and when they are, this is an indication that one is derived from the other. In addition, embryological studies examining similarities during development of various species. For instance, the “similarity of larval stages supports the conclusion that all crustaceans have homologous parts and a common

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