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What is Free Evolution?<br><br>Free evolution is the idea that natural processes can lead to the development of organisms over time. This includes the emergence and development of new species.<br><br>Many examples have been given of this, such as different varieties of stickleback fish that can live in salt or fresh water, as well as walking stick insect varieties that favor particular host plants. These mostly reversible trait permutations however, are not able to explain fundamental changes in body plans.<br><br>Evolution by Natural Selection<br><br>The development of the myriad living organisms on Earth is an enigma that has intrigued scientists for many centuries. Charles Darwin's natural selection theory is the best-established explanation. This is because individuals who are better-adapted have more success in reproduction and survival than those who are less well-adapted. As time passes, the number of well-adapted individuals grows and eventually develops into an entirely new species.<br><br>Natural selection is a process that is cyclical and involves the interaction of 3 factors: variation, reproduction and inheritance. Sexual reproduction and mutations increase the genetic diversity of a species. Inheritance is the transfer of a person's genetic traits to the offspring of that person, which includes both dominant and recessive alleles. Reproduction is the production of viable, fertile offspring,  [https://championsleage.review/wiki/User:Evolution4626 에볼루션 게이밍] 바카라 무료체험 ([https://ezstreamr.com/@evolution6432?page=about https://ezstreamr.Com/@evolution6432?page=about]) which includes both asexual and sexual methods.<br><br>Natural selection is only possible when all of these factors are in balance. If, for example the dominant gene allele causes an organism reproduce and survive more than the recessive gene, then the dominant allele is more prevalent in a population. If the allele confers a negative survival advantage or decreases the fertility of the population, it will be eliminated. The process is self-reinforced, meaning that an organism that has a beneficial trait will survive and reproduce more than one with an unadaptive characteristic. The greater an organism's fitness as measured by its capacity to reproduce and endure, is the higher number of offspring it can produce. People with good traits, like a long neck in giraffes,  에볼루션 룰렛 ([https://source.brutex.net/evolution5782 source.brutex.net]) or bright white color patterns on male peacocks, are more likely than others to reproduce and survive and eventually lead to them becoming the majority.<br><br>Natural selection only affects populations, not on individuals. This is a major distinction from the Lamarckian theory of evolution, which states that animals acquire traits either through use or lack of use. For instance, if the Giraffe's neck grows longer due to reaching out to catch prey and its offspring will inherit a more long neck. The difference in neck length between generations will persist until the giraffe's neck gets too long that it can not breed with other giraffes.<br><br>Evolution by Genetic Drift<br><br>Genetic drift occurs when alleles from the same gene are randomly distributed in a group. Eventually, only one will be fixed (become common enough that it can no more be eliminated through natural selection), and the rest of the alleles will drop in frequency. In extreme cases, this leads to dominance of a single allele. The other alleles are essentially eliminated, and heterozygosity falls to zero. In a small number of people this could lead to the complete elimination of the recessive gene. This scenario is called the bottleneck effect. It is typical of the evolutionary process that occurs when the number of individuals migrate to form a group.<br><br>A phenotypic  bottleneck can also occur when survivors of a disaster such as an outbreak or mass hunt event are concentrated in the same area. The surviving individuals will be largely homozygous for the dominant allele which means they will all have the same phenotype and thus have the same fitness characteristics. This may be caused by a conflict, earthquake, or even a plague. Regardless of the cause the genetically distinct group that remains could be prone to genetic drift.<br><br>Walsh,  [http://huaang6688.gnway.cc:3000/evolution4524 에볼루션 바카라 체험] 슬롯게임; [https://jobs.foodtechconnect.com/companies/evolution-korea/ Https://Jobs.Foodtechconnect.Com], Lewens, and Ariew use Lewens, Walsh, and Ariew use a "purely outcome-oriented" definition of drift as any deviation from the expected values of variations in fitness. They cite a famous instance of twins who are genetically identical, have identical phenotypes, and yet one is struck by lightning and dies, whereas the other lives and reproduces.<br><br>This kind of drift can be very important in the evolution of the species. It's not the only method of evolution. Natural selection is the main alternative, in which mutations and migration maintain the phenotypic diversity in a population.<br><br>Stephens claims that there is a vast difference between treating the phenomenon of drift as an agent or cause and treating other causes like selection mutation and migration as causes and forces. He argues that a causal mechanism account of drift permits us to differentiate it from other forces, and this distinction is crucial. He also argues that drift has a direction, i.e.,  [https://raamsesconstructions.in/question/10-things-people-hate-about-evolution-baccarat/ 에볼루션 바카라 무료체험] it tends to reduce heterozygosity. It also has a size, that is determined by population size.<br><br>Evolution by Lamarckism<br><br>When high school students take biology classes, they are frequently introduced to the work of Jean-Baptiste Lamarck (1744 - 1829). His theory of evolution, commonly referred to as "Lamarckism, states that simple organisms develop into more complex organisms by inheriting characteristics that result from the use and abuse of an organism. Lamarckism is usually illustrated with an image of a giraffe stretching its neck longer to reach the higher branches in the trees. This would cause the longer necks of giraffes to be passed to their offspring, who would then become taller.<br><br>Lamarck, a French Zoologist from France, presented a revolutionary concept in his 17 May 1802 opening lecture at the Museum of Natural History of Paris. He challenged conventional wisdom on organic transformation. According to him, living things had evolved from inanimate matter through a series of gradual steps. Lamarck wasn't the only one to make this claim, but he was widely regarded as the first to give the subject a comprehensive and general explanation.<br><br>The most popular story is that Charles Darwin's theory on natural selection and Lamarckism were competing in the 19th Century. Darwinism eventually prevailed, leading to what biologists call the Modern Synthesis. This theory denies acquired characteristics are passed down from generation to generation and instead argues that organisms evolve through the selective action of environment factors, including Natural Selection.<br><br>Lamarck and his contemporaries believed in the notion that acquired characters could be passed down to future generations. However, this idea was never a key element of any of their evolutionary theories. This is due to the fact that it was never tested scientifically.<br><br>However, it has been more than 200 years since Lamarck was born and, in the age of genomics there is a huge body of evidence supporting the heritability of acquired characteristics. It is sometimes called "neo-Lamarckism" or, more commonly epigenetic inheritance. This is a model that is just as valid as the popular Neodarwinian model.<br><br>Evolution through Adaptation<br><br>One of the most popular misconceptions about evolution is its being driven by a struggle to survive. This notion is not true and overlooks other forces that drive evolution. The fight for survival can be better described as a struggle to survive in a particular environment. This could include not only other organisms as well as the physical surroundings themselves.<br><br>Understanding adaptation is important to understand evolution. The term "adaptation" refers to any characteristic that allows living organisms to survive in its environment and reproduce. It could be a physical structure, like feathers or fur. It could also be a behavior trait, like moving into the shade during hot weather, or escaping the cold at night.<br><br>An organism's survival depends on its ability to draw energy from the environment and interact with other organisms and their physical environments. The organism must have the right genes for producing offspring and to be able to access sufficient food and resources. The organism should also be able to reproduce itself at the rate that is suitable for its specific niche.<br><br>These factors, in conjunction with mutations and gene flow can result in a shift in the proportion of different alleles in a population’s gene pool. This change in allele frequency can lead to the emergence of new traits, and eventually new species as time passes.<br><br>A lot of the traits we admire in plants and animals are adaptations. For instance lung or gills that extract oxygen from air feathers and fur as insulation, long legs to run away from predators and camouflage to conceal. However, a proper understanding of adaptation requires attention to the distinction between physiological and behavioral characteristics.<br><br>Physiological adaptations, like the thick fur or gills are physical traits, while behavioral adaptations, such as the tendency to seek out companions or to move into the shade in hot weather, are not. Furthermore it is important to remember that a lack of thought does not mean that something is an adaptation. Failure to consider the effects of a behavior, even if it appears to be logical, can make it inflexible.