• 목록
• 답변
• 글쓰기
• 게시판 리스트 옵션
  • 수정
  • 삭제

What is Free Evolution?

Free evolution is the idea that the natural processes of organisms can cause them to develop over time. This includes the appearance and development of new species.

Many examples have been given of this, such as different kinds of stickleback fish that can live in fresh or salt water and walking stick insect varieties that are attracted to particular host plants. These reversible traits, however, cannot explain fundamental changes in basic body plans.

Evolution by Natural Selection

The development of the myriad of living creatures on Earth is an enigma that has intrigued scientists for centuries. Charles Darwin's natural selection theory is the most well-known explanation. This is because those who are better adapted are able to reproduce faster and longer than those who are less well-adapted. Over time, a population of well-adapted individuals increases and eventually creates a new species.

Natural selection is a process that is cyclical and 에볼루션 카지노 사이트 involves the interaction of three factors including reproduction, variation and inheritance. Variation is caused by mutations and sexual reproduction, both of which increase the genetic diversity within a species. Inheritance refers to the passing of a person's genetic characteristics to their offspring, which includes both dominant and recessive alleles. Reproduction is the process of producing fertile, viable offspring. This can be achieved through sexual or asexual methods.

Natural selection is only possible when all of these factors are in balance. If, for instance the dominant gene allele causes an organism reproduce and survive more than the recessive gene allele, then the dominant allele becomes more prevalent in a population. However, if the gene confers an unfavorable survival advantage or decreases fertility, it will be eliminated from the population. The process is self-reinforcing which means that an organism that has an adaptive characteristic will live and reproduce more quickly than those with a maladaptive trait. The higher the level of fitness an organism has, measured by its ability reproduce and endure, is the higher number of offspring it will produce. Individuals with favorable traits, 에볼루션바카라사이트 such as having a longer neck in giraffes, or bright white patterns of color in male peacocks are more likely to survive and produce offspring, and thus will eventually make up the majority of the population over time.

Natural selection is only a force for populations, not individual organisms. This is an important distinction from the Lamarckian theory of evolution which argues that animals acquire characteristics through use or neglect. If a giraffe stretches its neck to reach prey, and the neck becomes larger, then its offspring will inherit this characteristic. The differences in neck size between generations will increase until the giraffe is no longer able to breed with other giraffes.

Evolution through Genetic Drift

Genetic drift occurs when alleles of a gene are randomly distributed within a population. In the end, only one will be fixed (become widespread enough to not longer be eliminated through natural selection), and the other alleles drop in frequency. This could lead to a dominant allele in extreme. The other alleles are eliminated, and heterozygosity decreases to zero. In a small group this could result in the complete elimination of the recessive allele. This scenario is known as a bottleneck effect and it is typical of the kind of evolutionary process when a large number of people migrate to form a new population.

A phenotypic bottleneck may also occur when survivors of a disaster like an outbreak or mass hunting event are confined to a small area. The survivors will share an allele that is dominant and will share the same phenotype. This could be caused by war, an earthquake or even a disease. The genetically distinct population, if it is left vulnerable to genetic drift.

Walsh, 에볼루션바카라 Lewens, and Ariew use Lewens, Walsh, and Ariew use a "purely outcome-oriented" definition of drift as any deviation from the expected values for different fitness levels. They give the famous example of twins who are genetically identical and have exactly the same phenotype, but one is struck by lightning and dies, but the other is able to reproduce.

This type of drift can play a significant role in the evolution of an organism. This isn't the only method for evolution. Natural selection is the most common alternative, in which mutations and migrations maintain phenotypic diversity within the population.

Stephens asserts that there is a big difference between treating the phenomenon of drift as a force, or 에볼루션바카라사이트 an underlying cause, and considering other causes of evolution such as mutation, selection, and migration as forces or causes. Stephens claims that a causal mechanism account of drift allows us to distinguish it from the other forces, and this distinction is essential. He argues further that drift has both direction, i.e., it tends to eliminate heterozygosity. It also has a size, which is determined by the size of the population.

Evolution through Lamarckism

When high school students study biology they are often introduced to the work of Jean-Baptiste Lamarck (1744 - 1829). His theory of evolution, often referred to as "Lamarckism" which means that simple organisms develop into more complex organisms adopting traits that are a product of an organism's use and disuse. Lamarckism is illustrated through an giraffe's neck stretching to reach higher leaves in the trees. This would cause the longer necks of giraffes to be passed onto their offspring who would grow taller.

Lamarck was a French zoologist and, in his opening lecture for his course on invertebrate zoology held at the Museum of Natural History in Paris on 17 May 1802, he presented an original idea that fundamentally challenged previous thinking about organic transformation. According to Lamarck, living creatures evolved from inanimate matter through a series gradual steps. Lamarck was not the first to suggest this however he was widely regarded as the first to offer the subject a comprehensive and general overview.

The most popular story is that Charles Darwin's theory on natural selection and Lamarckism were competing during the 19th century. Darwinism eventually triumphed and led to the development of what biologists call the Modern Synthesis. The theory argues that acquired characteristics can be acquired through inheritance and 에볼루션바카라 instead suggests that organisms evolve through the selective action of environmental factors, like natural selection.

While Lamarck believed in the concept of inheritance by acquired characters and his contemporaries also paid lip-service to this notion however, it was not an integral part of any of their evolutionary theorizing. This is due in part to the fact that it was never tested scientifically.

It's been more than 200 years since Lamarck was born and in the age genomics there is a huge amount of evidence to support the possibility of inheritance of acquired traits. It is sometimes called "neo-Lamarckism" or, more often, epigenetic inheritance. It is a variant of evolution that is as relevant as the more popular Neo-Darwinian theory.

Evolution by adaptation

One of the most common misconceptions about evolution is that it is being driven by a fight for survival. This is a false assumption and ignores other forces driving evolution. The fight for survival can be better described as a struggle to survive in a particular environment. This can be a challenge for not just other living things, but also the physical environment.

To understand how evolution works it is important to think about what adaptation is. The term "adaptation" refers to any specific feature that allows an organism to survive and reproduce within its environment. It could be a physiological feature, such as feathers or fur, or a behavioral trait like moving into the shade in the heat or leaving at night to avoid the cold.

The survival of an organism depends on its ability to draw energy from the environment and interact with other living organisms and their physical surroundings. The organism must have the right genes for producing offspring and be able find sufficient food and resources. Furthermore, the organism needs to be able to reproduce itself in a way that is optimally within its environment.

These factors, in conjunction with gene flow and mutations can result in an alteration in the ratio of different alleles in the population's gene pool. This shift in the frequency of alleles can result in the emergence of new traits and eventually, new species in the course of time.

Many of the characteristics we appreciate in animals and plants are adaptations. For instance the lungs or gills which extract oxygen from air, fur and feathers as insulation long legs to run away from predators, and camouflage to hide. However, a proper understanding of adaptation requires paying attention to the distinction between behavioral and physiological traits.

Physiological adaptations, like thick fur or gills, are physical traits, whereas behavioral adaptations, like the desire to find friends or to move to shade in hot weather, are not. Furthermore, it is important to understand that a lack of thought does not make something an adaptation. In fact, failure to think about the consequences of a behavior can make it unadaptive despite the fact that it might appear logical or even necessary.