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The Evolution Site The concept of natural selection as the underlying principle of evolution is the defining factor in the field of modern biology. It brings together disciplines such as genetics, palaeontology and microbiology. The study of evolution can be controversial, and the misinformation that comes from it can lead to confusion about its fundamentals. This Web site helps clarify essential concepts. What is Evolution? Modern evolutionary theory focuses on the gradual and cumulative changes that occur in populations over time. These changes are caused by natural selection, which increases the number of organisms that have traits that are beneficial and allow them to survive and reproduce in a specific environment. The organisms that have these traits produce more offspring as a result of the beneficial characteristics. This results in the genetic changes that can eventually lead to the creation of new species. The term “evolution” is usually associated with “survival-of-the best” which means that those who are better adaptable to specific environmental conditions will have an advantage over those less well-adapted. This is just one of many ways that evolution can occur. Another way of using the term “evolution” is to suggest that a species can change from one state to the next. This type of view of evolution could be described as anagenetic or cladogenesis. This view is not supported by the definition of evolution in science. The evolutionary theory that scientists have developed change is based on changes that occur in populations over time. These changes are the result of mutations which result in natural selection and genetic variation. Charles Darwin was one of the scientists who supported this theory. Others, notably Alfred Russel Wallace, who developed the theory of macroevolution believed that this was the only way the higher forms of life could be derived from lower ones. A concept must be able stand up to rigorous tests and evidence to be considered a theory. The evidence of evolution has stood the test of time and has been backed by numerous studies in a wide range of sciences, from geology to biology to astronomy. In fact, evolution is accepted as one of the fundamental tenets of science today and is supported by the vast majority of scientists worldwide. 무료 에볼루션 are misinformed about the nature of the theory of evolution particularly how it is connected with religion. What is the Theory of Evolution? Evolution is a scientific explanation of how living things change over time. It is based upon a few well-established facts: that many more offspring are produced than can survive and that different individuals have their physical characteristics and that they can pass on traits to the next generation. These observations are backed up by an increasing body of evidence derived from molecular biology, palaeontology and climatology functional geology, morphology. Charles Darwin and Alfred Russel Wallace independently conceived the theory of evolution by selection in the mid-19th Century as a reason 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 instance complex organisms 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 will be to pass its genes to the next generation. Some people oppose evolution because they believe it implies that there is no reason for existence. 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, including some respected evangelical Christian leaders. Many of these scientists have contributed to the understanding of a wide range of phenomena, including phylogenetics and genomics and the formation and purpose of fossils. The term “theory” is often used to refer to a guess or speculation, when in fact it refers to a scientific hypothesis that has been thoroughly developed and tested over time. Scientists test their hypotheses by repeating the experiment or observations that led to them. Therefore the theory of evolution theory has been repeatedly confirmed, along with the related theories of Copernican theory as well as atomic theory and germ theory. What is the Process of Evolution? The process of evolution is a gradual shift in the proportions of genetically diverse individuals within a species over time. This change is the result of the natural selection of individuals that are more well-adapted to their environment. The individuals who are more adapted have higher chances of reproducing and survival. As more of these people survive and reproduce, their genes become more common in the population. This is often referred to as “survival of the strongest.” According to the theory of evolution the mutations that cause genomic variation are the raw material of evolutionary change. These mutations may occur at random or be affected by the environment. When mutations occur randomly and the frequencies of alleles will vary from generation to generation. In contrast, when the mutation is beneficial, it will increase the frequency of the allele, which causes it to spread across the population. Over time, these changes in allele frequencies can result in the creation of new species. The new species will then grow and evolve into new forms. This is known as macroevolution. The creation of new species is typically a result of changes in the environment that make certain resources accessible or creates new environmental challenges. For instance, the development of finches on the Galapagos Islands is a result of the availability of various foods and the need to protect themselves from predators. In 에볼루션 사이트 , evolution is defined as any change that takes place in the nature of organisms over time. The change could be minor like the development of a new coloration or massive, for instance, the creation of a new organ. Scientists who accept evolution theory generally believe that genetic change is important in generating evolution. They also believe that evolution is a process that happens in time, typically over millions of years. They differ on the importance of various factors that can accelerate or slow down the process. For instance, the role of sexual selection, environmental pressures and mutation bias. Despite these differences scientists believe that evolution has happened and that evidence for this is overwhelming. What evidence do we have to support 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. Other evidence is found in similarities among living organisms embryology, biogeography genetics and comparative anatomy. The evolutionary tree is the most effective method of proving evolution. It demonstrates how species are closely related. Homologous structures are another source of evidence. They share a similar structure but serve different purposes in different species, such as the wing of a bat or bird. The fact that different species develop and adapt to the same environment is also a sign of evolution. For instance, arctic-foxes and Ptarmigans sport white seasonal pelts that blend into the snow and ice. This is a form of convergent evolutionary process which suggests the species shared ancestral ancestors. Vestigial structures are a different piece of evidence. These are parts of an organism which may have served a purpose in the past. For instance the human appendix may be an oblique reminder of an organ used to digest food. These structures tend to shrink in size once they are no longer used in a process called natural selection. Scientists have also gathered evidence for evolution by observing and experimenting. The evidence for evolution is grouped into six categories: directly observed small-scale changes, biogeographic distribution as well as comparative anatomy, fossil record, genetics, and classification. Each of these categories offers convincing evidence for the evolution of life. Many people are misinformed about the theory of evolution. However, it's a fact. It is not a speculative theory, but rather a powerful collection that is based on years of observation. No matter what people believe or don't believe about the theory of evolution scientists continue to study and gather new information to better know the story of life on Earth. This information will help scientists to understand how to avoid future global catastrophes and also how to best utilize the resources of our planet. This information will also help us better meet the needs and wants of all the people living on our planet.