Darwin's Theory Of Evolution By Natural Selection

Darwin’s theory of evolution is an idea that all living organisms are related and have a common ancestor. His broad theory speculates that progression of life from non-living and emphasizes an all in all realistic “descent with modification”. In other words, complicated creatures emerged from uncomplicated creatures consistently over time. This meaning stray genetic mutations happen in an organism’s genetic code. These mutations, which are useful, are retained as they help in survival, also known as Natural Selection. Natural selection happens only by taking advantage of minor subsequent variations. Darwin’s theory can be characterized by the simple facts of life. One of the vital intentions for all species is to survive and reproduce, …show more content…
Natural selection means that organisms or species that are best suited for the environment and with certain favorable inherited traits are most likely to survive and reproduce. Those with the weaker traits will not be able to survive or reproduce. Mutations are not common but when they do happen, they can benefit, hurt, or remain neutral in an organism or species. The only mutations that scientist are concerned with in evolution are the ones can be passed down from generation to generation. Genetic drift is a change in the gene pool in a small group of organisms or species due to chance. Gene flow is when an organism or species migrates between different populations. This causes a variation in genetics because of a new gene being introduced in the population. Comparative embryology studies the embryos of different organisms and species. The embryos of different species and organisms show commonalities that suggest a common ancestor. Modern examples of evolution can be shown by studying the results of scientific research that shows evolutionary changes in species or organisms populations that are alive today. Radioisotope dating gauges the age of rocks and fossils by looking at the scale of isotopes in the rocks. Isotopes are separate forms of an atom that make up matter on earth. Some of the isotopes, the ones called radioactive isotopes, throw away particles over an amount of time and change into different particles. The fossil record of change in extinct species gives us an undeniable record of past changes through massive time periods. Some of the extinct species and organisms had traits that were fluctuating between dominate groups of organisms or species. Their existence supports the idea that species are not permanent but can and do progress into other organisms or species over a period of