Natural Selection First Described in Full by Term Paper

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Natural Selection

First described in full by Charles Darwin, natural selection refers to the process by which organisms evolve by adapting to their environments. Natural selection does not occur instantly in response to an environmental change, however. Rather, natural selection occurs over the course of several successive generations. Those organisms that successfully survive the environmental changes due to their inherited traits will pass on their genes to their offspring. Thus, only those organisms with hardy genes will survive; hence the phrase "survival of the fittest." While natural selection does occur unaided by human beings in the natural world, humans are beginning to alter the course of natural evolution through the creation and implementation of certain chemical products. Moreover, environmental pollution and other human factors impact the process of natural selection and evolution in the plant and animal kingdoms. Chemical products such as antibiotics, pesticides, and herbicides in particular threaten to create strains of unwanted or destructive species.

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In the search for weed-free fields and disease-free bodies, human beings may be unwittingly creating "super bugs," or viruses that are virtually indestructible. Therefore, a thorough understanding of the basics of natural selection is important in understanding the full environmental and human health ramifications of using antibiotics, pesticides, herbicides, and other chemical means of killing off unwanted organisms and bacteria.

By creating and using new chemicals, human beings are directly causing rapid natural selection in bacteria strains, insects, viruses, and weeds, mainly because these products do not eradicate all the target organisms. Those organisms with hardy genes, genes resistant to the chemicals, will survive and in turn pass on their hardy genes to their offspring. The offspring will therefore be resistant or entirely immune to the chemicals, rendering them ineffective. Moreover, because only the stronger organisms survive, subsequent generations….....

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