Evolution
Evolution is the change that species undergo over time. To be more specific, evolution is the change in the gene pools of living populations of species which occurs over time. A hereditary unit that can be passed on unaltered for many generations is a gene and the set of all genes in a species or population is the gene pool. The first point stated by the theory of evolution, and possibly the most important, is that all life forms have developed from other species. It also states that all living things are related to one another to different degrees and that they all share common ancestors. The third point is that all life on Earth has a common origin. To make it simpler, all life arose from a once existing original life form. The process by which one species evolves into another requires genetic mutations, or changes, is the fourth and final statement in the theory of evolution. In order for evolution to occur, three main mechanisms must occur, natural selection, genetic drift, and mutation. Natural selection is the process by which traits that provide a reproductive advantage tend to increase in frequency in a given species over time. Also, traits that put individuals at a disadvantage most likely decrease
proteins in living things are made of only twenty kinds of amino acids. Not only that, but most organisms are alike because they all either get their energy In conclusion, biological evolution is the change that every species undergo over time. The theory of evolution states that all life forms have developed from other things, among numerous other points. Also, the three main mechanisms that must occur in order for evolution to take place are mutation, genetic drift, and natural selection. The most popular piece of evidence for evolution are the fossil records. Chemical and structural similarities are also very important when comes to the truth of evolution. Two more specific points of evidence are genetic changes over generations and geographic distribution of related species. Because of these four points of evidence, it is clear that evolution had occurred in the past and still continues to take place in all living communities of individuals.
Some topics in this essay:
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Approximate Word count = 1026
Approximate Pages = 4 (250 words per page double spaced)
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