Twenty years ago the scientist, who died yesterday at the age of 60, had a life-threatening bout of cancer. Many readers will remember the way he wrote about that episode, not only for its personal candor but also for the fact that he found comfort in a statistical analysis of his chances of survival. It was wholly in keeping with the tenor of Mr. Gould's character that he could turn an understanding of statistics into a toehold on life itself.
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The free Science research paper Gradualism versus Punctuationism essay presented on this page should not be viewed as a sample of our on-line writing service. Although this may be the case, the two theories do diverge on one important point, the notion of periods of stasis, but when taken as a whole, the evidence suggests that punctuationism is not as radical as it has been hyped up to be.
In terms of evaluating both arguments, it is important to dispel the some common myths about punctuationist theory.
First, there appear to be many large gaps in the fossil record Dawkins, Both gradualists and punctuationists agree that the only explanation for these apparent gaps, besides the notion that there are gaps in the record, would be creationism.
Creationism holds that the reason for the appearance of largely different organisms in the fossil record, without organisms that display intermediate amounts of change is the presence of a divine creator.
Neither gradualists nor punctuationists agree with this assumption. In addition, when comparing the theories of gradualism with punctuationism, it is important to evaluate the theory of saltationism. Although punctuationists have often been confused with saltationists, this is a huge mistake.
Saltationism holds that macromutations are the cause of evolutionary change Dawkins, This could make sense when viewed in the context of the fossil record.
Saltationists would argue that there really are no gaps in the fossil record. The dramatic changes noted in the fossil record would be products of macromutations which are signs of natural selection. This cannot be the case for two distinct reasons. First, large macromutations are considerably maladaptive for an organism.
In this sense, the size of a mutation will determine whether the organism will survive and pass on the mutated gene. Larger mutations will be less likely to be selected, because they will produce large behavioral abnormalities in the organism, which will significantly impair the organism in carrying out normal species-typical behaviors for survival.
In turn, the organism will probably die before it is able to successfully reproduce. In addition, some mutations that are termed macromutations are not really macromutations at all, but instead small changes in the genetic instructions that produce large changes in the individual. It has also been argued, that gradualists believe that evolution proceeds in a constant fashion.
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Search the site GO. Animals and Nature. Evolution Basics History of Life on Earth Human Evolution Natural Selection Charles Darwin Evidence. Gradualism versus Punctuationism Although modern evolutionists are thought to be divided on the issues surrounding evolutionary theory, a close look at the evidence suggests that both the gradualist school of thought and the punctuationist school of thought share many characteristics in common.
Gradualism Versus Punctuationism Essay Gradualism versus Punctuationism Although modern evolutionists are thought to be divided on the issues surrounding evolutionary theory, a close look at the evidence suggests that both the gradualist school of thought and the punctuationist school of thought share many characteristics in common.
Essay about Gradualism Versus Punctuationism - Gradualism versus Punctuationism Although modern evolutionists are thought to be divided on the issues surrounding evolutionary theory, a close look at the evidence suggests that both the gradualist school of thought and the punctuationist school of thought share many characteristics in .
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