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The Evolution Site The concept of natural selection as the basis of evolution is the unifying force in the current biology. It connects disciplines as diverse as genetics, microbiology, and Palaeontology. However the study of evolutionary theory is often controversial, and the resulting misinformation can confuse people about the fundamentals of evolution. This site can help explain the most important concepts. What is Evolution? The modern conception of evolution focuses on the gradual and cumulative changes that happen within populations over time. These changes are caused by natural selection, a process that increases the number of organisms that possess beneficial traits that enable them to live and reproduce in a particular environment. The organisms that have these traits produce more offspring as a result of the beneficial traits. This can result in a genetic mutation that could eventually lead to new species. The term “evolution” is usually associated with “survival-of-the best” which implies that people who are better adapted to certain environmental conditions will have an advantage over those less well-adapted. In reality, this is only one of the many different ways that evolution can occur. Another common way the word evolution is used is to suggest that a species will inevitably progress from one state to the next one. This view of evolution is known as anagenetic or cladogenesis. This is not backed by the scientific definition of evolution. Instead the scientific theory of evolution concentrates on the changes that occur within populations over time and these changes are caused by genetic mutations and natural selection. Charles Darwin was one of the scientists who backed this theory. Others, such as Alfred Russel Wallace, who came up with the macroevolution theory and believed that this was the only way that the higher forms of life could have evolved from the lower forms. A theory must stand against rigorous tests and evidence in order to be considered a theory. Evolution has stood the test of time, and has been proven to be valid in many scientific disciplines, from geology to biology, chemistry to astronomy. Evolution is a cornerstone of science and is believed by a majority of scientists around the world. Many people have misconceptions regarding the nature of the evolution theory and how it connects with religion. What is the Theory of Evolution (Evolutionary Theory)? Evolution is an explanation for the way living things change over time. It is based on a few known facts: that more offspring are created than can survive and that different individuals have their physical characteristics, and that they are able to pass on traits to the next generation. These observations are backed by the increasing body of evidence from molecular biology, palaeontology, climatology, functional morphology and geology. Charles Darwin and Alfred Russel Wallace independently developed the theory of evolution based on selection in the mid-19th century as an explanation why organisms adapt to their physical and biological environments. It is the most well-supported and tested theory in the field of science. Its predictions were proved by the fact, for example that more complex organisms have less genetic mutations. In addition, the more efficient an organism is in surviving and reproducing, the more likely it is to pass its genes to future generations. Some people object to evolution based on the belief that it implies that there is no purpose to life. However, a lot of scientists who are also religious believers, such as the prominent Cambridge Palaeontologist Simon Conway Morris, believe that evolution is not only compatible with faith in God but is enhanced by it (BioLogos 2014). Many highly qualified evolutionary biologists have been involved in developing and testing the theory of evolution, which includes some respected evangelical Christian leaders. Many of these scientists have contributed to the understanding of a wide variety of phenomena like phylogenetics, genomics, and the formation and purpose of fossils. The term “theory” is often used in a wrong sense to mean a speculation or guess however it actually is a scientific hypothesis that has been rigorously tested and refined over time. Scientists test hypotheses through repeating the experiments or observations that led them to their conclusions. So the theory of evolution theory has been repeatedly confirmed as have the corresponding theories of Copernican theory, atomic theory, and germ theory. What is the Process of Evolution? The process of evolution is a gradual change in the genetically different individuals within a particular species over time. This change is a result of natural selection, which favors individuals who are better adapted for their environment. The individuals who are more adaptable have a greater chance of survival and reproduction. As more of these people survive and reproduce, their genes become more common in the general population. This is sometimes called “survival of the most fittest.” According to the theory of evolution the mutations that result in genomic variation are the primary basis for evolutionary change. These mutations can occur at random, or under the influence of the environment. When 에볼루션사이트 occur at random and the frequencies of alleles will vary from generation to generation. If a mutation is beneficial it will increase the allele frequency which causes the allele to be spread across the population. Over time, these shifts in allele frequencies can lead to the formation of new species. The new species can then develop further and evolve into newer forms. This process is known as macroevolution. The development of a new species is often due to changes in the environment that provide certain types of resources available or cause new environmental problems. 에볼루션 무료 바카라 of finches in the Galapagos Islands, for example, is due to the availability of new foods and the necessity to defend themselves from predators. In 무료에볼루션 is possible to define evolution as any change in the character of living organisms over time. This change can be subtle, such as the development of a new color or dramatic, like the formation of an organ. Scientists who accept the theory of evolution generally agree on the significance of genetic change in generating evolution. They also agree that the process of evolution happens over a long period of time, typically millions of years. However, they differ over the role of different factors that speed up or slow down this process, such as the role of environmental pressures, sexual selection, and mutation bias. Despite these differences most scientists are still convinced that evolution is real and that the evidence to support this is overwhelming. What is the Evidence of Evolution? Since Darwin's time, scientists have gathered evidence to support his theory of evolution. A portion of this evidence comes from fossils which show the changing characteristics of living things over time. Another evidence comes from similarities between living organisms embryology, biogeography genetics and comparative anatomy. The evolutionary tree is the most effective method of proving evolution. It shows how species are closely related. Another evidence source is homologous structures, which have a similar structure in different species but have distinct functions, such as the wings of bats and birds. The fact that different species evolve and adapt to the same environment is another sign of evolution. For example, arctic foxes and ptarmigans have seasonal white pelts to blend in with snow and ice. This is a type of convergent evolutionary, which suggests that the species has common ancestors. Vestigial structures are a different piece of evidence. These are parts of an organism that may have served some purpose in the past. For instance the human appendix is an oblique reminder of an organ that served to digest food. Natural selection is a process that causes these structures to shrink as they are no longer used. Scientists have also gathered evidence of evolution through observation and testing. The evidence for evolution is divided into six categories: directly visible small-scale changes in biogeographic distribution, comparative anatomy, the fossil record, classification and genetics. Each of these provides convincing evidence that the evolution of life has occurred. While many people are misinformed about the theory of evolution, it is an empirical fact. It isn't simply a flimsy theory. It is a potent collection of decades of observations and data that has been tested and proven. Scientists continue to gather and analyze new data to better understand the evolution of Earth's evolution regardless of whether people believe in the theory of evolution or not. This knowledge will allow scientists to better understand how we can avoid future global catastrophes and how to use the resources of our planet. This information will also help us better serve the needs and wants of all the people living on this planet.