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What is Free Evolution?<br><br>Free evolution is the notion that the natural processes of organisms can lead to their development over time. This includes the evolution of new species and transformation of the appearance of existing species.<br><br>A variety of examples have been provided of this, including various varieties of stickleback fish that can be found in fresh or salt water and walking stick insect varieties that prefer specific host plants. These typically reversible traits cannot explain fundamental changes to the body's basic plans.<br><br>Evolution by Natural Selection<br><br>The evolution of the myriad living creatures on Earth is a mystery that has fascinated scientists for many centuries. The best-established explanation is that of Charles Darwin's natural selection, an evolutionary process that is triggered when more well-adapted individuals live longer and reproduce more successfully than those that are less well-adapted. As time passes, the number of individuals who are well-adapted grows and eventually develops into an entirely new species.<br><br>Natural selection is a cyclical process that is characterized by the interaction of three factors including inheritance, variation, and reproduction. Sexual reproduction and mutations increase genetic diversity in the species. Inheritance refers to the passing of a person's genetic characteristics to the offspring of that person which includes both dominant and recessive alleles. Reproduction is the process of producing viable, fertile offspring. This can be achieved by both asexual or sexual methods.<br><br>Natural selection only occurs when all these elements are in equilibrium. If, for instance an allele of a dominant gene allows an organism to reproduce and survive more than the recessive gene allele then the dominant allele becomes more prevalent in a group. If the allele confers a negative advantage to survival or decreases the fertility of the population, it will be eliminated. The process is self-reinforcing, which means that an organism with a beneficial characteristic is more likely to survive and reproduce than one with an unadaptive characteristic. The greater an organism's fitness as measured by its capacity to reproduce and survive, is the greater number of offspring it produces. People with good traits, such as a longer neck in giraffes and bright white colors in male peacocks are more likely to survive and have offspring, so they will eventually make up the majority of the population over time.<br><br>Natural selection only affects populations, not individual organisms. This is a crucial distinction from the Lamarckian evolution theory, which states that animals acquire traits either through use or lack of use. If a giraffe extends its neck in order to catch prey and its neck gets larger, then its children will inherit this characteristic. The difference in neck size between generations will continue to grow until the giraffe is unable to reproduce with other giraffes.<br><br>Evolution by Genetic Drift<br><br>In genetic drift, the alleles at a gene may attain different frequencies in a population through random events. At some point, only one of them will be fixed (become common enough that it can no longer be eliminated through natural selection), and the other alleles will drop in frequency. In extreme cases, this leads to dominance of a single allele. The other alleles are eliminated, and heterozygosity falls to zero. In a small number of people, this could result in the complete elimination the recessive gene. This is known as the bottleneck effect and [https://fritzaquatics.com/?URL=https://evolutionkr.kr/ ์๋ณผ๋ฃจ์ ์นด์ง๋ ธ] is typical of an evolution process that occurs when an enormous number of individuals move to form a group.<br><br>A phenotypic bottleneck can also happen when the survivors of a catastrophe, such as an epidemic or a massive hunting event, are condensed within a narrow area. The surviving individuals will be mostly homozygous for the dominant allele, which means they will all have the same phenotype and consequently have the same fitness characteristics. This can be caused by war, earthquakes or even a plague. The genetically distinct population, if it remains susceptible to genetic drift.<br><br>Walsh Lewens and Ariew utilize Lewens, Walsh, and Ariew use a "purely outcome-oriented" definition of drift as any departure from the expected values for different fitness levels. They provide a well-known instance of twins who are genetically identical, have identical phenotypes but one is struck by lightning and dies, while the other lives and reproduces.<br><br>This type of drift can play a significant part in the evolution of an organism. But, it's not the only method to progress. Natural selection is the primary alternative, in which mutations and migration keep the phenotypic diversity in the population.<br><br>Stephens argues there is a huge difference between treating the phenomenon of drift as a force or cause, [http://101.43.178.182/zzmyphp/so/?domain=evolutionkr.kr ์๋ณผ๋ฃจ์ ์ฌ๋กฏ๊ฒ์][https://www.zhengjie.com/link?target=https%3A%2F%2Fevolutionkr.kr%2F ์๋ณผ๋ฃจ์ ๋ฐ์นด๋ผ]; [https://rostokfamily.ru/bitrix/redirect.php?event1=click_to_call&event2=&event3=&goto=https://evolutionkr.kr/ you can try rostokfamily.ru], and treating other causes like migration and selection mutation as causes and forces. He argues that a causal process account of drift permits us to differentiate it from the other forces, and this distinction is crucial. He also claims that drift has a direction: that is it tends to eliminate heterozygosity. He also claims that it also has a magnitude, which is determined by the size of population.<br><br>Evolution by Lamarckism<br><br>In high school, students take biology classes, they are frequently introduced to the work of Jean-Baptiste Lamarck (1744 - 1829). His theory of evolution is generally known as "Lamarckism" and it asserts that simple organisms evolve into more complex organisms through the inheritance of characteristics that are a result of the natural activities of an organism usage, use and disuse. Lamarckism can be demonstrated by a giraffe extending its neck to reach higher leaves in the trees. This would cause the necks of giraffes that are longer to be passed onto their offspring who would then grow even taller.<br><br>Lamarck Lamarck, a French Zoologist from France, presented an idea that was revolutionary in his 17 May 1802 opening lecture at the Museum of Natural History of Paris. He challenged previous thinking on organic transformation. According Lamarck, living organisms evolved from inanimate matter by a series of gradual steps. Lamarck wasn't the first to propose this, but he was widely regarded as the first to offer the subject a thorough and general treatment.<br><br>The dominant story is that Charles Darwin's theory of evolution by natural selection and Lamarckism fought in the 19th Century. Darwinism ultimately won and led to what biologists call the Modern Synthesis. This theory denies that acquired characteristics can be inherited and instead, it argues that organisms develop through the action of environmental factors, such as natural selection.<br><br>Lamarck and his contemporaries supported the idea that acquired characters could be passed down to the next generation. However, this notion was never a central part of any of their theories on evolution. This is due to the fact that it was never scientifically tested.<br><br>It has been more than 200 years since the birth of Lamarck and in the field of genomics, there is a growing evidence base that supports the heritability acquired characteristics. This is sometimes called "neo-Lamarckism" or more frequently, epigenetic inheritance. It is a variant of evolution that is just as relevant as the more popular Neo-Darwinian theory.<br><br>Evolution through adaptation<br><br>One of the most commonly-held misconceptions about evolution is that it is being driven by a struggle to survive. This is a false assumption and ignores other forces driving evolution. The struggle for survival is more accurately described as a struggle to survive within a specific environment, which can include not just other organisms, but also the physical environment itself.<br><br>To understand how evolution works it is important to consider what adaptation is. The term "adaptation" refers to any characteristic that allows a living thing to survive in its environment and reproduce. It could be a physical structure like fur or feathers. Or it can be a trait of behavior that allows you to move towards shade during hot weather, or [https://pmarm.ru/bitrix/rk.php?goto=https://evolutionkr.kr/ ์๋ณผ๋ฃจ์ ๋ธ๋์ญ] escaping the cold at night.<br><br>The survival of an organism is dependent on its ability to extract energy from the environment and interact with other organisms and their physical environments. The organism must have the right genes to produce offspring and be able find enough food and resources. In addition, the organism should be capable of reproducing itself in a way that is optimally within its environment.<br><br>These factors, in conjunction with mutations and gene flow, can lead to changes in the proportion of different alleles in the population's gene pool. Over time, this change in allele frequency can lead to the emergence of new traits and ultimately new species.<br><br>Many of the features we admire in animals and plants are adaptations. For example, lungs or gills that extract oxygen from air, fur and feathers as insulation long legs to run away from predators and camouflage to conceal. However, a proper understanding of adaptation requires a keen eye to the distinction between the physiological and behavioral characteristics.<br><br>Physiological adaptations, such as the thick fur or gills are physical characteristics, whereas behavioral adaptations, like the desire to find companions or to move into the shade in hot weather, aren't. It is also important to keep in mind that insufficient planning does not cause an adaptation. In fact, a failure to think about the implications of a behavior can make it unadaptive despite the fact that it may appear to be logical or even necessary.
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