Essay about Evolution : Natural Selection And Types Of Evidence For Evolution

Essay about Evolution : Natural Selection And Types Of Evidence For Evolution

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All living species will never stop evolving over time due to one important key concept incorporated in the theory of evolution: natural selection (lecture). Impressive, isn’t it? To think that this mechanism has always been present to help the survival of the breathing kind (lecture). Therefore, the objective of this essay consists of demonstrating the notions about evolution and its four mechanisms, the process of natural selection, the theory of natural selection and types of evidence for evolution.

To begin with, let’s point out what is evolution, its causes, and the mechanisms that produce it. Descent with modification is the most important understanding within the explanation of evolution (lecture). In other words, evolution signify the biological modifications from an individual to the other or from one generation to the other in a population. It’s also important to know that every evolution in the different communities on Earth had begun from a common ancestor and will keep giving offspring as long as the individuals reproduce themselves (lecture). We can interpret that as all living things on Earth are related indirectly one with another. Then, evolution happens because there is a change in gene frequency inside a population over time (lecture). This change takes place in a part of the DNA and is the reason why we differ. There are four mechanisms that allows evolution to occur: mutation, migration, genetic drift and natural selection (lecture). A mutation is a random modification in an individual DNA that can vary its attitude and appearance from its forefather (lecture). The mutation can be either favored, rejected or neutral depending on the features of the environment where the organisms found itself (WDNK, 2001). ...


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...lution and how the species genetic variation help them to survive in their environment and to spread those features to future generations. Then, I demonstrate how the theory of natural selection by Charles Darwin, which has been written with the support of his multiple observations in South America, was a revolutionary work that change how people thought. I finally testify my understanding of the subject by describing the different type of evidence for evolution with multiple examples such as dinosaur tooth, shark tooth, the forelimb of tetrapods, etc. Now that we are fully informed with the process of natural selection, it would be interesting to see how the other key concept of evolution act on all living kind.

*Sometimes a lot of paraphrasing will only be cited at the begging and the end of a paragraph because the all the information comes from the same source.

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