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Evidences Of The Theory Of Evolution

711 words - 3 pages

Evolution is not simply a matter of change over time. Lots of things change over time, but they aren't all examples of evolution because they don't involve descent through genetic inheritance. Evolution is the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth. In genetic terms it is a change in the occurrence of alleles in a population over time. There is so much evidence that supports the theory of evolution. “Evidence could be provided from sources as different as ancient fossils and modern genetics labs. It also comes from comparing the anatomy of creatures living today. All creatures with four limbs have the same bone structure in each limb, indicating their descent from a common ancestor. More evidence comes from biogeography. Isolated islands are missing common species found on the mainland, but are filled with many unique species that can be related by a common ancestor. Evidence also comes from embryonic development. As an embryo of a mammal grows, its heart develops through stages similar to fish, amphibians, and reptiles.” (http://biologos.org/questions/what-evidence-do-we-have-for-evolution-besides-fossils-and-genes) The Theory of evolution is based on natural selection. Natural selection keeps useful advantages that can help later generations survive in their environment. On single gene traits it can cause changes in allele frequency and in phenotype frequency. Natural selection is the idea of Survival of the fittest, organisms that are more fit to their environment will survive and eventually out-number the organisms that are naturally disadvantaged. Darwin’s idea of natural selection included: variation, inheritance, high rate of population growth, and survival and reproduction. Variation can be several things such as eye color and hair color. Inheritance is the traits that are passed down from parent to offspring. Organism should be able to reproduce a good amount of offsprings to increase the rate of population growth and organisms should be able to survive in their environment.

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