Darwin's Theory of Natural Selection

2096 Words Jul 23rd, 2003 9 Pages
Charles Darwin revolutionized biology when he introduced The Origin of Species by Means of Natural Selection in 1859. Although Wallace had also came upon this revelation shortly before Origins was published, Darwin had long been in development of this theory. Wallace amicably relinquished the idea to Darwin, allowing him to become the first pioneer of evolution. Darwin was not driven to publish his finding, which he'd been collecting for several years before Wallace struck upon it, because he had "never come across a single [naturalist] who seemed to doubt to permanence of species" (Ridley, pp. 70). What follows are the key points of Darwin's Theory of Natural Selection taken directly from the two chapters concerning it in his book …show more content…
This is also known as ordinary selection because it begins with one individual and it's constitution and habits. Another method of Natural Selection is sexual selection. Sexual selection arises from interspecies cross breeding. This, Darwin explains, deviates from the struggle for existence and becomes the struggle for progeny. Advances in an individual will often allow it a better chance to procreate. A males ability to woo the female by singing, shows of strength, or decoration have definite effects as to whether or not he will be able to mate. The same goes for the female's ability to attract the male's attention. Some of these techniques or differences can also sometimes be used in the struggle for existence giving that particular variation the advantage. Lastly, Darwin explains extinction and divergence of character in relation to Natural Selection. With extinction Darwin shows it is necessary for the adapted variation to proliferate. As the adapted variation begins to increase in numbers because of its greater ability to survive conditions, it's obvious the older variety must become rarer. Rarity is the first sign of extinction, because with smaller numbers, there is a smaller chance of propagating, and a smaller chance of adapting. This will eventually lead to
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