Essay on Evolution - 925 Words

Essay on Evolution There are many mechanisms that lead to evolutionary change. One of the most important mechanism in evolution is natural selection which is the differential success in the reproduction of different phenotypes resulting from the interaction of organisms with their environment. Natural selection occurs when a environment makes a individual adapt to that certain environment by variations that arise by mutation and genetic recombination. Also it favors certain traits in a individual than other traits so that these favored traits will be presented in the next generation. Another mechanism of evolution is genetic drift. Genetic drift is a random change in a small gene pool due to sampling errors in propagation of alleles or†¦show more content†¦Some bacteria had genes that coded for enzymes that specifically destroyed certain antibiotics such as ampicillin. From this incident, scientists were able to deduce that natural selection helped the bacteria to inherit the genes for antibio tic resistance. Scientists have also been able to use biochemistry as a source of evidence. The comparison of genes of two species is the most direct measure of common inheritance from shared ancestors. Using DNA-DNA hybridization, whole genomes can be compared by measuring the extent of hydrogen bonding between single-stranded DNA obtained from two sources. The similarity of the two genes can be seen by how tightly the DNA of one specie bonds to the DNA of the other specie. Many taxonomic debates have been answered using this method such as whether flamingos are more closely related to storks or geese. This method compared the DNA of the flamingo to be more closely related to the DNA of the stork than the geese. The only disadvantage of this method is that it does not give precise information about the matchup in specific nucleotide sequences of the DNA which restriction mapping does. This technique uses restriction enzymes that recognizes a specific sequence of a few nucleotides a nd cleaves DNA wherever such sequences are found in the genome. Then the DNA fragments are separated by electrophoresis and compared toShow MoreRelated Evolution Essay597 Words   |  3 PagesEvolution Evolution is a complex process by which the characteristics of living organisms change over many generations as traits are passed from one generation to the next. Many scientists agree on that concept. They have been trying to develop this theory over hundreds of years to make it reasonable and beliveable to people. But is evolution the reason that humans are on earth? People that are not quite religious and have little faith in God believe in evolution. Those who strongly standRead MoreEssay on The Evolution of Speech1080 Words   |  5 PagesThe Evolution of Speech The purpose of this essay is to identify the evolutionary evidence of speech. The articles reviewed in this paper affirm the evidence of evolution of speech. Much is unknown about the evolution of speech, however, fossil evidence points to adaptations for speech appearing between 1.5 million and 500,000 years ago. Fossil evidence for the evolution of speech is shown in the earliest hominins to one of our well known ancestors, the homo erectus. There are differences betweenRead MoreThe Theory of Evolution Essay1255 Words   |  6 PagesThe theory of evolution by natural selection does not interfere with the Judeo-Christian view of god as the creator, based on multiple sources including statements from the Pope himself. 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In order to fully examine this argument, it must first be determined what moral and absoluteRead MoreEssay on Creation vs. Evolution1373 Words   |  6 PagesThe purpose of this essay is not to prove â€Å"Darwinian† evolution, as the writer would be performing a feat already done by others, but to examine a certain track of thought amongst Creation proponents. Specifically their noting certain improbabilities of evolutions ability to â€Å"design.† Ill evade defining the individual concepts because theyve all been described before, and far better than I could manage, although Ill point out that micro/macro evolution distinction is largely Creationist lingoRead More Evolution vs. Creation Essay915 Words   |  4 Pagescovered in this piece is that of whether or not evolution should be taught in classrooms. Also, if it is to be taught, should it be taught as fact or theory? It is also intended to present enough evidence to disprove evolution altogether and, as a resul t, make it much less than a theory, but actually the vain opinions of a man who chose not to accept the truth. nbsp;nbsp;nbsp;nbsp;nbsp;The entire point of this essay is to breakdown the theory of evolution, invalidate its scientific reliability, andRead MoreTheory of Evolution: The Evolution of Hox Cluster Essay808 Words   |  4 PagesDear Mr. Darwin, In your book The Origin of Species you talked about how natural selection was how evolution took place, yet you did not know how this mechanism was actually involved in evolution. Well you were right and now we know how natural selection plays a part in evolution. Natural selection does play a big part but there are others mechanisms that help shape how an organism evolves. These mechanisms include migration, isolation, genetic drift, and mutations. A specific new field in biology