What Is Natural Selection?

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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 …show more content…

Natural selection is the process by which random modifications (mutations), related to a distinct individual’s chance of survival by adapting to its environment (food, predators, environmental features), are selected by nature in a total logical way (lecture). Basically, natural selection functions like this: the individuals among a community with the most advantageous characteristics regard to the survival and reproduction rate will spread on these inherent genetic traits to their offspring (Futuyma, 2004). Over time, these traits will become more frequent in the genetic basis of future generations and eventually all the living species within a population will gain those features (lecture). There are three preconditions for natural selection to exist (lecture). The first one is variation. It simply means that there will be changes in the DNA and those modifications are the reason why we vary in a population. The second one is differential reproductive success. This condition suggests that some individuals have more offspring than others and it generally has to do with competition between species. The third one is heredity which supports that we inherited the genetic basis of our creators, half of each parent. In brief, natural selection is broadly associated with the capacity of species to adapt in their environment and occurs only through three primordial preconditions: variation, differential reproduction and

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