Namely, horse breeders will ensure that horses with particular characteristics, such as speed and endurance, are allowed to produce offspring while horses that do not share those above-average traits will not. Natural selection parallels selective breeding employed by humans on domesticated animals for centuries. Consequently, simpleorganisms evolve into more complex and different organisms as species break away from one another. (3) Through natural selection, organisms could branch off of each other and evolve to the point where they no longer belong to the same species. On the other hand, as a species continues to ‘improve’ itself, it branches out to create entirely new species that are no longer capable of reproducing together. Therefore, this natural selection ensures that a species gradually improves itself over an extended duration of time. Over time beneficial traits and characteristics that promote survival will be kept in the gene pool while those that harm survival will be selected against. As a result, through random mutation and genetic drift, over time offspring develop new traits and characteristics. Yet, no two offspring are perfectly alike. One of the core tenets of Darwin’s theory is that more offspring are always produced for a species than can possibly survive. (2) Natural selection contributes to the basis of Darwin’s Theory of Evolution.
Specifically, Darwin’s keen observation of the fossils and wildlife he saw during his time on the Beagle served as the basis for the cornerstone of his theory : natural selection. Because of his experience aboard the Beagle, he laid the foundation for his Theory of Evolution while also establishing himself within the scientific community. Beagle, a British sloop belonging to the Royal Navy. Although initially entering into medicine, Darwin chose to pursue his interest in natural science and embarked on a five-year journey aboard the H.M.S. Therefore, the Theory of Evolution, while controversial, has shaped and influenced the modern scientific world’s thinking on the development of life itself. The theory is based on the assumptions that life developed from non-life and progressed and evolved in an indirect manner. Darwin was an English scientist in the 19th century best known for his book “On the Origin of Species.” In his book, Darwin postulated different species shared characteristics of common ancestors, that they branched off from common ancestors as they evolved, and that new traits and characteristics were a result of natural selection. TOEFL Reading Test 1 Charles Darwin’s Theory of Evolution (1) Charles Darwin’s Theory of Evolution is known as one of the most important and controversial scientific theories ever published.
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