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The Evolution Site The theory of natural selection as the basis of evolution is the defining factor in modern biology. It combines disciplines such as microbiology, palaeontology, genetics and palaeontology. However the study of evolution is often controversial and the resultant misinformation can confuse people about its fundamentals. This site clarifies essential concepts. What is Evolution? Modern evolutionary theory focuses on the gradual and cumulative changes that take place in populations over time. These changes are the result of natural selection. This is a process that increases the number of organisms that have beneficial traits, which help them to live and reproduce in certain environments. The organisms that have these traits produce more offspring because of the beneficial traits. This causes a genetic change that can eventually lead to the formation of new species. The term “evolution”, is often associated with “survival-of-the fittest” which implies that individuals who are better adjusted to certain conditions will have a distinct advantage over those who are less well adapted. In actuality it is only one of many ways that evolution can occur. Another common way the term “evolution” is used is to suggest that a species will inevitably progress from one state of being to the next state of being. This view of evolution is called anagenetic or cladogenesis. The scientific definition of evolution is not in agreement with this view. The evolutionary theory that scientists have developed change focuses instead on the changes that occur in populations over time. These changes are caused by mutations which result in natural selection and genomic variation. Some scientists, such as the great Charles Darwin, advocated this theory of evolution. Others, notably Alfred Russel Wallace, who came up with the macroevolution theory and believed that this was the only way the higher forms of life could be derived from lower ones. A theory must stand up to rigorous tests and evidence in order to be considered as a theory. The evidence for evolution has withstood the test of time and has been supported by countless studies in a wide range of scientific disciplines, from geology to biology to astronomy. Evolution is the foundation of science and is backed by a majority of scientists around the world. Many people are misinformed about the nature of evolution theory and how it connects with religion. What is the Theory of Evolution? Evolution is the scientific explanation for the way living things change over time. It is based on a range of well-established and observable facts that show that more offspring are often produced than could possibly survive and that individuals differ from one another in their physical characteristics (phenotype) and that distinct characteristics result in different rates of survival and reproduction and can be passed on to future generations. These findings are supported by the growing body of evidence from molecular biology, palaeontology functional morphology, climatology and geology. Charles Darwin and Alfred Russel Wallace independently conceived the theory of evolution by selection in the mid-19th century as a way to explain how organisms adapt to their physical and biologic environments. It is now the best-supported and widely-tested theory in the field of science. Its predictions have been borne out by the evidence that, for instance complex organisms tend to have less genetic mutations than simpler ones. In addition the more successful an organism is in surviving and reproducing and reproducing, the more likely it is to pass its genes to the next generation. Some people are against evolution because they believe that it implies there is no purpose for life. Many scientists who are religious believers, like the Cambridge Palaeontologist Simon Conway Morris (BioLogos, 2014), believe that evolution is compatible with faith in God and even enhanced by it. Many highly skilled evolutionary biologists have been involved in constructing and testing the theory of evolution, which includes several revered evangelical Christian leaders. Many of these researchers contributed to the understanding a vast array of phenomena, such as genomics and phylogenetics, and also the formation and function of fossils. The word “theory” is often used incorrectly to mean a guess or speculation, when in fact it is a scientific hypothesis that has been rigorously developed and tested over time. Scientists test hypotheses by repeating the experiments or observations that led them to the conclusion. The theory of evolution has been repeatedly proven out as have the corresponding theories of Copernican, germ theory, and atomic theory. What is the Process of Evolution? The process of evolution is the gradual change over time in the proportion of genetically distinct individuals within a specific species. This change is a result of the natural selection of individuals that are better adapted to their environment. The individuals who are more adaptable have a higher chance of survival and reproduction. As more of these individuals survive and reproduce their genes are more prevalent within the population. This is sometimes referred to as “survival for the strongest.” According to theories of evolution the mutations that cause genomic variation are what triggers evolution. 에볼루션 바카라 사이트 can occur at random or be influenced by the environment. If mutations are random, the frequencies of the resulting alleles may differ from generation to generation. If a mutation is beneficial it will increase the allele frequency, causing the allele to be spread across the population. These changes in allele frequency can result in new species as time passes. The new species could grow and evolve into newer forms. This is a process called macroevolution. The formation of a new species is often due to changes in the environment which allow certain kinds of resources to become available or cause new environmental problems. For instance, the development of finches in the Galapagos Islands is a result of the availability of various food sources and the need to protect themselves from predators. In a broader context the term “evolution” can be described as any change in the nature of living organisms over time. This change can be small, such as the development of a new coloration, or even massive, like the formation of a new organ. Scientists who believe in evolution theory generally agree that genetic change is crucial in the process of generating evolution. They also agree that the process of evolution happens over a long time, typically millions of years. They differ in the importance of various factors that may speed up or slow down this process. For instance, the role of sexual selection, environmental pressures, and mutation bias. Despite these differences most scientists still believe that evolution is real and that the evidence in support of this is overwhelming. What is the Evidence of Evolution? Since Darwin's time, scientists have collected evidence to back his theory of evolution. The evidence comes from fossils which show the evolution of organisms over time. Similarities between living and non-living organisms as well as embryology, biogeography, and genetics are evidence. The main proof of evolution is in the evolutionary tree, which shows how different species are related. Another source of evidence is homologous structures, which have similar structure in different species but perform distinct functions such as the wings of bats and birds. The fact that different species develop and adapt to the same environment is also evidence of evolution. For instance, arctic-foxes and Ptarmigans sport white fur coats which blend with snow and ice. This is a type of convergent evolutionary process, which suggests that the species share common ancestors. Another source of evidence is the existence of vestigial structures. These are unutilized parts of an organism which could serve a purpose in the distant ancestors. The human appendix for instance, is a vestige from an organ that was used to digest food. Natural selection causes these structures to shrink as they are no longer used. Scientists have also collected other evidence for evolution through observation and experimentation. The evidence for evolution can be grouped into six different categories: directly observed changes at a smaller scale biogeographic distributions and comparative anatomies fossil records, genetics. Each of these categories provides compelling evidence for the evolution of life. Although many people have misconceptions about the theory of evolution It is an empirical fact. It is not only a theory, it is a powerful collection of decades of research and observation that has been tested and proven. Whatever people believe or deny about the theory of evolution scientists continue to research and collect new data in order to further understand the history of life on Earth. This information will help scientists to understand how to avoid future catastrophes on the planet and how to best use the resources on our planet. It will also enable us to better serve the needs of the people on this planet.