This Is The Complete Guide To Free Evolution > 자유게시판

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

What is Free Evolution?

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

This has been proven by numerous examples of stickleback fish species that can live in fresh or saltwater and walking stick insect types that prefer particular host plants. These typically reversible traits do not explain the fundamental changes in the body's basic plans.

Evolution through Natural Selection

Scientists have been fascinated by the development of all the living organisms that inhabit our planet for ages. Charles Darwin's natural selectivity 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. As time passes, the number of individuals who are well-adapted grows and eventually forms an entirely new species.

Natural selection is an ongoing process and involves the interaction of three factors that are: reproduction, variation and inheritance. Sexual reproduction and mutation increase the genetic diversity of a species. Inheritance refers the transmission of genetic characteristics, which includes both dominant and recessive genes to their offspring. Reproduction is the generation of viable, fertile offspring, which includes both asexual and sexual methods.

All of these variables have to be in equilibrium for natural selection to occur. If, for instance an allele of a dominant gene makes an organism reproduce and survive more than the recessive gene then the dominant allele is more prevalent in a group. If the allele confers a negative survival advantage or decreases the fertility of the population, it will disappear. The process is self reinforcing, which means that an organism that has an adaptive characteristic will live and reproduce much more than those with a maladaptive trait. The more fit an organism is which is measured by its ability to reproduce and endure, is the higher number of offspring it will produce. People with desirable traits, like having a long neck in giraffes, or bright white patterns on male peacocks, are more likely than others to live and reproduce, which will eventually lead to them becoming the majority.

Natural selection is only an aspect of populations and not on individuals. This is a significant distinction from the Lamarckian theory of evolution, 에볼루션 바카라사이트 [index] which claims that animals acquire characteristics through use or disuse. For example, if a animal's neck is lengthened by stretching to reach prey its offspring will inherit a more long neck. The length difference between generations will continue until the neck of the giraffe becomes too long that it can no longer breed with other giraffes.

Evolution by Genetic Drift

In the process of genetic drift, alleles at a gene may be at different frequencies within a population by chance events. Eventually, one of them will attain fixation (become so widespread that it cannot be removed through natural selection), while other alleles will fall to lower frequency. This can lead to dominance in the extreme. The other alleles are eliminated, and heterozygosity falls to zero. In a small group it could lead to the complete elimination of recessive alleles. This is known as the bottleneck effect. It is typical of the evolutionary process that occurs when an enormous number of individuals move to form a group.

A phenotypic bottleneck may also occur when the survivors of a catastrophe like an outbreak or mass hunting event are confined to an area of a limited size. The survivors will carry an dominant allele, and will share the same phenotype. This situation could be caused by earthquakes, war, or even plagues. Regardless of the cause, the genetically distinct population that remains could be prone to genetic drift.

Walsh, Lewens and Ariew define drift as a deviation from the expected values due to differences in fitness. They provide the famous case of twins who are both genetically identical and 에볼루션 슬롯게임 share the same phenotype. However, one is struck by lightning and dies, whereas the other continues to reproduce.

This kind of drift could play a very important role in the evolution of an organism. However, it is not the only method to evolve. Natural selection is the most common alternative, in which mutations and migrations maintain phenotypic diversity within the population.

Stephens asserts that there is a vast distinction between treating drift as an actual cause or force, and 에볼루션 바카라 treating other causes like selection mutation and migration as forces and causes. He claims that a causal-process model of drift allows us to separate it from other forces and that this distinction is crucial. He also argues that drift has a direction: that is it tends to reduce heterozygosity, and that it also has a size, that is determined by the size of the population.

Evolution through Lamarckism

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 often called "Lamarckism" and it asserts that simple organisms evolve into more complex organisms via the inheritance of characteristics that result from the organism's natural actions use and misuse. Lamarckism is usually illustrated with an image of a giraffe stretching its neck longer to reach higher up in the trees. This could cause giraffes' longer necks to be passed onto their offspring who would then grow even taller.

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 the traditional thinking about organic transformation. According to him, living things had evolved from inanimate matter through an escalating series of steps. Lamarck was not the only one to suggest that this could be the case but he is widely seen as giving the subject its first broad and comprehensive analysis.

The prevailing story is that Lamarckism grew into a rival to Charles Darwin's theory of evolution through natural selection, and that the two theories battled out in the 19th century. Darwinism ultimately prevailed, leading to what biologists call the Modern Synthesis. The theory argues that acquired characteristics can be inherited and instead argues that organisms evolve through the action of environmental factors, including natural selection.

Although Lamarck supported the notion of inheritance by acquired characters and 에볼루션 바카라사이트 his contemporaries spoke of this idea, it was never a major 에볼루션바카라사이트 (click here.) feature in any of their evolutionary theorizing. This is due in part to the fact that it was never validated scientifically.

It's been over 200 year since Lamarck's birth and in the field of age genomics, there is an increasing evidence base that supports the heritability-acquired characteristics. This is often referred to as "neo-Lamarckism" or more commonly epigenetic inheritance. This is a model that is as valid as the popular Neodarwinian model.

Evolution by the process of 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 fight to survive in a certain environment. This could be a challenge for not just other living things but also the physical environment.

To understand how evolution works it is important to understand what is adaptation. The term "adaptation" refers to any characteristic that allows a living thing to live in its environment and reproduce. It could be a physical feature, such as feathers or fur. Or it can be a characteristic of behavior that allows you to move towards shade during hot weather or escaping the cold at night.

The ability of an organism to extract energy from its environment and interact with other organisms and their physical environments is essential to its survival. The organism must have the right genes to produce offspring, and be able to find enough food and resources. In addition, the organism should be capable of reproducing at a high rate within its environmental niche.

These elements, in conjunction with gene flow and mutation result in an alteration in the percentage of alleles (different varieties of a particular gene) in the gene pool of a population. As time passes, this shift in allele frequency can lead to the emergence of new traits, and eventually new species.

Many of the features that we admire about animals and plants are adaptations, such as the lungs or gills that extract oxygen from the air, feathers or fur to provide insulation and long legs for running away from predators and camouflage to hide. However, a proper understanding of adaptation requires a keen eye to the distinction between physiological and behavioral characteristics.

Physical characteristics like large gills and thick fur are physical characteristics. The behavioral adaptations aren't an exception, for instance, the tendency of animals to seek out companionship or to retreat into the shade during hot weather. It is also important to note that insufficient planning does not make an adaptation. In fact, failure to think about the consequences of a decision can render it unadaptive even though it appears to be logical or even necessary.