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What is Free Evolution?<br><br>Free evolution is the concept that the natural processes of organisms can cause them to develop over time. This includes the development of new species and alteration of the appearance of existing species.<br><br>This has been demonstrated by numerous examples of stickleback fish species that can live in salt or fresh water, and walking stick insect varieties that are apprehensive about specific host plants. These reversible traits cannot explain fundamental changes to the body's basic plans.<br><br>Evolution through Natural Selection<br><br>Scientists have been fascinated by the development of all the living creatures that live on our planet for centuries. The most widely accepted explanation is that of Charles Darwin's natural selection process, a process that occurs when individuals that are better adapted survive and reproduce more successfully than those less well-adapted. Over time, the population of well-adapted individuals grows and eventually creates a new species.<br><br>Natural selection is a cyclical process that is characterized by the interaction of three elements including inheritance, variation, and reproduction. Sexual reproduction and mutations increase the genetic diversity of an animal species. Inheritance is the transfer of a person's genetic traits to his or  [https://utahsyardsale.com/author/pastablood5/ 에볼루션 바카라 사이트] her offspring, which includes both recessive and dominant alleles. Reproduction is the production of viable, fertile offspring, which includes both asexual and sexual methods.<br><br>All of these variables have to be in equilibrium to allow natural selection to take place. If, for instance an allele of a dominant gene allows an organism to reproduce and survive more than the recessive allele then the dominant allele will become more prevalent in a group. But if the allele confers an unfavorable survival advantage or decreases fertility, it will disappear from the population. This process is self-reinforcing which means that an organism that has a beneficial trait is more likely to survive and reproduce than an individual with an inadaptive characteristic. The higher the level of fitness an organism has which is measured by its ability to reproduce and survive, is the more offspring it produces. Individuals with favorable characteristics, like longer necks in giraffes or bright white color patterns in male peacocks, are more likely to survive and produce offspring, which means they will eventually make up the majority of the population over time.<br><br>Natural selection only acts on populations, not individuals. This is a crucial distinction from the Lamarckian evolution theory which holds that animals acquire traits due to the use or absence of use. For instance, if a giraffe's neck gets longer through stretching to reach prey, its offspring will inherit a more long neck. The difference in neck length between generations will continue until the giraffe's neck gets so long that it can no longer breed with other giraffes.<br><br>Evolution through Genetic Drift<br><br>In genetic drift, the alleles within a gene can be at different frequencies in a population due to random events. Eventually, only one will be fixed (become common enough that it can no longer be eliminated by natural selection),  [https://elearnportal.science/wiki/The_Top_Reasons_Why_People_Succeed_In_The_Evolution_Baccarat_Site_Industry 에볼루션 카지노] and  [https://fkwiki.win/wiki/Post:Heres_A_Few_Facts_Regarding_Evolution_Baccarat_Site 에볼루션바카라] the other alleles will diminish in frequency. In extreme cases it can lead to dominance of a single allele. Other alleles have been basically eliminated and heterozygosity has diminished to a minimum. In a small population it could result in the complete elimination of the recessive gene. This is known as the bottleneck effect and is typical of an evolutionary process that occurs whenever the number of individuals migrate to form a population.<br><br>A phenotypic 'bottleneck' can also occur when the survivors of a catastrophe like an outbreak or mass hunting event are concentrated in an area of a limited size. The survivors will carry a dominant allele and thus will share the same phenotype. This situation might be the result of a conflict, earthquake or even a disease. The genetically distinct population,  [https://021lyrics.com/index.php?title=User:AdelaidaTrethowa 무료에볼루션] if left, could be susceptible to genetic drift.<br><br>Walsh, Lewens and Ariew define drift as a deviation from the expected values due to differences in fitness. They cite a famous instance of twins who are genetically identical, share the exact same phenotype but one is struck by lightning and dies, while the other lives and reproduces.<br><br>This type of drift is very important in the evolution of an entire species. However, it's not the only way to evolve. Natural selection is the main alternative, in which mutations and migrations maintain phenotypic diversity within a population.<br><br>Stephens claims that there is a significant difference between treating drift like an actual cause or force, and treating other causes such as migration and selection as causes and  [http://jade-crack.com/home.php?mod=space&uid=1449099 무료에볼루션] forces. He claims that a causal-process account of drift allows us differentiate it from other forces and this differentiation is crucial. He also claims that drift is a directional force: that is, it tends to eliminate heterozygosity. It also has a magnitude, that is determined by the size of the population.<br><br>Evolution by Lamarckism<br><br>Biology students in high school are often exposed to Jean-Baptiste lamarck's (1744-1829) work. His theory of evolution, also called "Lamarckism is based on the idea that simple organisms evolve into more complex organisms through taking on traits that are a product of the use and abuse of an organism. Lamarckism is illustrated through a giraffe extending its neck to reach higher leaves in the trees. This could cause giraffes' longer necks to be passed onto their offspring who would then become taller.<br><br>Lamarck was a French zoologist and, in his opening lecture for his course on invertebrate zoology at the Museum of Natural History in Paris on the 17th of May in 1802, he introduced an original idea that fundamentally challenged the previous understanding of organic transformation. In his view living things evolved from inanimate matter through the gradual progression of events. Lamarck wasn't the only one to suggest this however he was widely considered to be the first to provide the subject a thorough and general treatment.<br><br>The prevailing story is that Lamarckism was a rival to Charles Darwin's theory of evolution through natural selection and both theories battled it out in the 19th century. Darwinism eventually triumphed and led to the development of what biologists today call the Modern Synthesis. This theory denies acquired characteristics can be passed down and instead, it claims that organisms evolve through the influence of environment factors, such as Natural Selection.<br><br>Lamarck and his contemporaries endorsed the idea that acquired characters could be passed on to the next generation. However, this concept was never a major part of any of their theories on evolution. This is due in part to the fact that it was never validated scientifically.<br><br>It's been more than 200 years since Lamarck was born and in the age of genomics, there is a large amount of evidence that supports the possibility of inheritance of acquired traits. This is also known as "neo Lamarckism", or more generally epigenetic inheritance. It is a variant of evolution that is just as relevant as the more popular Neo-Darwinian model.<br><br>Evolution by adaptation<br><br>One of the most common misconceptions about evolution is that it is being driven by a fight for survival. In reality, this notion is a misrepresentation of natural selection and ignores the other forces that are driving evolution. The fight for survival can be more accurately described as a struggle to survive in a specific environment. This may be a challenge for not just other living things as well as the physical surroundings themselves.<br><br>Understanding how adaptation works is essential to understand evolution. It refers to a specific characteristic that allows an organism to survive and reproduce within its environment. It can be a physiological structure such as feathers or fur or a behavioral characteristic, such as moving into the shade in hot weather or coming out at night to avoid the cold.<br><br>The capacity of an organism to draw energy from its surroundings and interact with other organisms and their physical environments, is crucial to its survival. The organism must possess the right genes to create offspring, and it must be able to access enough food and other resources. Moreover, the organism must be capable of reproducing itself at an optimal rate within its environment.<br><br>These factors, in conjunction with mutations and gene flow can result in a shift in the proportion of different alleles in the population's gene pool. Over time, this change in allele frequencies could result in the development of new traits and ultimately new species.<br><br>A lot of the traits we appreciate in animals and plants are adaptations. For example the lungs or gills which draw oxygen from air feathers and fur for insulation long legs to run away from predators and camouflage for hiding. However, a proper understanding of adaptation requires a keen eye to the distinction between the physiological and behavioral traits.<br><br>Physiological adaptations like the thick fur or gills are physical traits, while behavioral adaptations, like the desire to find friends or to move to the shade during hot weather, are not. Additionally it is important to understand that lack of planning does not make something an adaptation. In fact, failing to consider the consequences of a behavior can make it unadaptable even though it might appear sensible or even necessary.