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The Evolution Site The theory of natural selection as the underlying principle of evolution is the central force in the field of modern biology. It ties together disciplines that are as diverse as genetics microbiology, and palaeontology. The study of evolution may be controversial and the misinformation that results can lead to confusion about the fundamentals of evolution. This site clarifies essential concepts. What is Evolution? The current understanding of evolution is based on the gradual change that occurs within populations over time. These changes are the results 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 specific environments. As a result, these organisms have more offspring than those that do not have the beneficial characteristics. This results in a genetic change that can eventually lead to the formation of new species. The term “evolution” is often associated with the notion of “survival of the fittest” which means that individuals who are best adapted to a specific set of environmental conditions will have an advantage over those who aren't well-adapted. In reality, this is only one of the many different ways in which evolution can occur. Another way that the term “evolution” is used to suggest that a species will eventually move from one state of being to the next state of being. This type of view of evolution is referred to as anagenetic or cladogenesis. The scientific definition of evolution does not support this view. Instead, the theory of evolution that is scientifically based focuses on changes that occur within populations over time and these changes are caused by mutations that produce genomic variation and natural selection. Charles Darwin was one of the scientists who backed this view. Others, notably Alfred Russel Wallace, who created the macroevolution theory believed that this was the only way the higher forms of life could be derived from lower forms. For a concept to be considered a theory, it has to be capable of standing up to rigorous testing and evidence. The evidence of evolution has withstood the test of time and has been backed by countless studies in a wide range of scientific disciplines, ranging from biology to geology to chemistry to astronomy. Evolution is a fundamental concept in science and is supported by a majority of scientists across the globe. Many people are misinformed about the nature of the evolution theory and how it connects to religion. What is the Theory of Evolution? Evolution is an explanation for how living things change over time. It is based on a variety of well-established observable facts that show that more offspring are produced than could possibly survive and that individuals differ from one another in their physical characteristics (phenotype) and that various traits confer varying rates of survival and reproduction and can be passed down to future generations. 에볼루션 무료 바카라 are supported by the increasing body of evidence from molecular biology, palaeontology, functional morphology, climatology and geology. Charles Darwin and Alfred Russel Wallace independently developed the theory of evolution by selection in the middle of the 19th century as an explanation why organisms adapt to their physical and biologic environments. It is the most widely supported and tested theory in science. Its theories have been proven out by the fact that, for example, more complex organisms tend to have fewer genetic mutations than simpler ones. Additionally, the more successful an organism is at surviving and reproducing in its ability to reproduce, the more likely it is to pass on its genes to the next generation. Some people oppose evolution because they believe that it suggests that there is no purpose for life. Many scientists who are religious believers such as the Cambridge palaeontologist Simon Conway Morris (BioLogos, 2014) believe that evolution is compatible with faith in God and even enhanced by it. Many highly qualified evolutionary biologists have been involved in constructing and testing the theory of evolution, including several highly respected evangelical Christian leaders. Many of these researchers contributed to the understanding of a vast array of phenomena, such as phylogenetics and genomics, and also the formation and function of fossils. The term “theory” that is often misused is a reference to a scientific hypotheses that have been tested and refined over time. Scientists test their hypotheses by repeating experiments or observations that have led to them. Therefore, the theory of evolution has been repeatedly borne out and so have the theories of Copernican, germ theory, and atomic theory. What is the Process of Evolution? The process of evolution is a gradual change in the genetic makeup of different individuals within a particular species over time. This change is a result of natural selection, which favors individuals who are better adapted to their environment. The more adapted individuals have a better chance of survival and reproduction. As more people live and reproduce, their genes become more prevalent in the general population. This is sometimes called “survival of the most fittest.” According to 에볼루션사이트 of mutations that result in genetic variation are the primary reason for evolutionary change. These mutations may occur at random or under the influence of the environment. When mutations are random, the frequency of the resultant alleles could differ from generation to generation. If a mutation is beneficial it can increase the frequency of the allele which causes the allele to be spread across the population. These changes in allele frequency can result in new species over time. The new species could continue to evolve and become newer forms. This process is called macroevolution. The formation of a new species is often due to changes in the environment that allow certain kinds of resources to become available or cause new environmental challenges. For example, the evolution of finches on the Galapagos Islands is a result of the availability of various food sources and the need defend themselves from predators. In a wider context the term “evolution” refers to any change that takes place in the nature of organisms over time. This change can be small or even the creation of a new coloration or even massive, like the development of a brand new organ. Scientists who accept evolution theory generally believe that genetic change is crucial in the process of creating evolution. They also acknowledge that the process of evolution occurs over a long period of time, often millions of years. However, they differ over the role of different factors that speed up or slow down the process, including the influence of environmental pressures sexual selection, and mutation bias. Despite these differences, the majority of scientists are still convinced that evolution is real and 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. Some of this evidence comes from fossils which demonstrate the changing features of living organisms over time. Another evidence comes from similarities among living organisms, embryology, biogeography, genetics and comparative anatomy. The evolutionary tree is the best method to prove the existence of evolution. It demonstrates how species are closely related. Another way to prove it is homologous structures, which have similar structure in different species, but have distinct functions, such as the wings of birds and bats. Evolution is also evident in the fact that different species adapt and grow to similar environments. For instance, arctic foxes and ptarmigans grow seasonal white pelts that blend in with snow and ice. This is a kind of convergent evolutionary, which suggests that the species has common ancestors. Another source of evidence is vestigial structures, which are unutilized parts of an organism that could have served a function in the distant ancestor. The human appendix for instance, is a vestige from an organ that once used to digest food. These structures tend to shrink in size once they're no longer in use, a process known as natural selection. Scientists have also gathered evidence for evolution through observation and experimenting. The evidence for evolution is grouped into six categories: directly visible small-scale changes, biogeographic distribution, comparative anatomy, the fossil record, genetics, and classification. Each of these provides compelling evidence that evolution of life has occurred. Many people have misconceptions regarding the theory of evolution. But, it's a fact. It is not a theory, but a powerful collection that is based on decades of observation. No matter what people believe or deny about the theory of evolution, scientists continue to study and gather new information in order to further know the story of life on Earth. This information will help scientists to better understand how to prevent future global catastrophes and how to best utilize the resources of our planet. This information will also allow us to better meet the needs and desires of all the people living on this planet.