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The Evolution Site
The theory of evolution by natural selection is the defining force of modern biology. It combines disciplines such as genetics, palaeontology and microbiology.
However the study of evolution is often controversial, and the resulting misinformation can confuse people about its basic concepts. This Web site helps clarify essential concepts.
What is Evolution?
The modern understanding of evolution focuses on the gradual change that occurs within populations over time. These changes are the result of natural selection. This is a process that increases the number organisms with beneficial traits, which allow them to thrive and reproduce in specific environments. The organisms that have these traits produce more offspring as a result of their positive characteristics. This causes the genetic changes that can eventually lead to the development of new species.
The term "evolution", is often associated with "survival-of-the most fittest" which implies that individuals who are more adapted to certain environmental conditions will have a distinct advantage over those who are less well-adapted. In reality it is only one of many ways in which evolution can occur.
Another popular way in which the word evolution is used is to suggest that a species will inevitably move from one state to the next state of being. This view of evolution can be described as anagenetic, or cladogenesis. The scientific definition of evolution does not support this idea. Instead, the theory of evolution that is scientifically based is based on the changes that happen within populations over time, and 에볼루션 바카라 무료 these changes are the result of mutations that produce genomic variation and natural selection.
Charles Darwin was one of the scientists who supported this view. Alfred Russel Wallace who developed the macroevolution theory believed that this was only way the higher forms of living could have evolved.
In order for a concept to be referred to as a theory, it has to be able to stand up to rigorous tests and evidence. Evolution has stood the test of time and has been proven to be valid in countless scientific disciplines from geology to biology, chemistry to astronomy. Evolution is a cornerstone of science and is backed by a majority of scientists across the globe. Many people are misinformed about the nature of the evolution theory, especially how it relates to religion.
What is the Theory of Evolution (Evolutionary Theory)?
Evolution is the scientific explanation for how living things change over time. It is based upon a few known facts: that more offspring are produced than can be surviving, that individuals differ in their physical characteristics, and that they can transmit traits to future generations. These observations are supported by the increasing amount 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 a reason why organisms are able to adapt to their physical and biologic environments. It is currently the most well-supported and widely-tested theory in all of science. Its predictions were proven by the evidence that, for instance, more complex organisms are less susceptible to genetic mutations. The more successful an organism gets in terms of surviving and reproducing, the more likely it will transmit its genes to the next generation.
Some people oppose evolution because they believe it implies that there is no meaning to life. Many scientists who are religious, 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 qualified evolutionary biologists have been involved in constructing and testing the theory of evolution, including several revered evangelical Christian leaders. Many of these scientists contributed to the understanding a wide range phenomena, including genomics and phylogenetics and also the formation and function fossils.
The word "theory" that is often misinterpreted, refers to a scientific hypotheses that have been tested and refined over a long period of time. Scientists test their theories by repeating the experiment or observations that led to them. Therefore the theory of evolutionary 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 the gradual shift over time in the proportion of genetically distinct individuals within a particular species. This change is a result of natural selection, which favors those who are better adapted to their environment. The individuals who are more adapted have higher chances of reproduction and survival. As more of these people survive and reproduce their genes, they are more prevalent in the general population. This is sometimes called "survival of the most fittest."
According to the theory of evolution, the mutations that produce genomic variation are the raw material for evolution. These mutations may occur randomly or under the influence of the environment. When mutations are random the frequencies of the resulting alleles may differ from generation to generation. However, when the mutation is beneficial it increases the frequency of the allele, causing it to spread throughout the population.
Over time, these shifts in allele frequencies can result in the creation of new species. The new species will then evolve and develop into newer forms. This is a process called macroevolution. The formation of new species is usually a result of changes in the environment, that make certain resources accessible or creates new environmental challenges. For instance, the development of finches in the Galapagos Islands is a result of the availability of different food sources and the need protect themselves from predators.
In a broader sense the term "evolution" refers to any change that takes place in the traits of organisms over time. The change could be minor, such as the development of a new coloration, or massive, for instance, the creation of a new 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 takes place over a long time, often millions of years. They differ on the importance of various factors that could speed up or slow down the process. For example, the role of sexual selection, environmental pressures, and mutation bias. Despite these differences scientists believe that evolution is happening and that the evidence for this is overwhelming.
What evidence can be found for evolution?
Since Darwin's time, scientists have collected evidence to support his theory of evolution. Some of this evidence comes from fossils which demonstrate the changing features of living things over time. Similarities between living organisms as well as embryology, biogeography and 에볼루션 무료 바카라코리아 - Read Webpage - genetics are further evidence.
The primary evidence of evolution can be found in the evolutionary tree, which demonstrates how species are related. Homologous structures are another source of evidence. They share a similar structure but perform different functions in different species, such as the wing of a bat or bird. The fact that different species develop and adapt to a similar environment is also evidence of evolution. For 에볼루션 무료 바카라 instance, arctic-foxes and ptarmigans grow white fur coats that blend in with snow and ice. This is a kind of convergent evolutionary, which suggests that the species has common ancestors.
Vestigial structures are another piece of evidence. They are the remains of an organism that could have served some purpose in the past. For example the human appendix is a vestige of a once-used organ used to digest food. Natural selection causes the structures to shrink when they are no longer used.
Scientists have also collected other evidence of evolution through observation and experimentation. The evidence for evolution can be grouped into six different categories: changes that can be observed at a small scale, biogeographic distributions and comparative anatomies, the fossil record and genetics. Each of these provides compelling evidence that the evolution of life has occurred.
While many people are misinformed about the theory of evolution, it is an established fact. It is not a speculative theory, but a powerful collection that is built on decades of observation. Scientists continue to gather and analyze new data to better understand the arc of the Earth's life, regardless of whether people believe in the theory of evolution or not. This information will aid scientists understand how to prevent future global catastrophes and also how to best use the resources of our planet. This will allow us to better meet the needs of people living on this planet.