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

What is Free Evolution?

Free evolution is the notion that natural processes can lead to the development of organisms over time. This includes the development of new species and alteration of the appearance of existing species.

Many examples have been given of this, including various kinds of stickleback fish that can be found in salt or fresh water, and walking stick insect varieties that favor specific host plants. These reversible traits do not explain the fundamental changes in the body's basic plans.

Evolution through Natural Selection

Scientists have been fascinated by the evolution of all the living creatures that live on our planet for many centuries. Charles Darwin's natural selectivity is the most well-known explanation. This happens when those who are better adapted have more success in reproduction and survival than those who are less well-adapted. Over time, 에볼루션 바카라 무료에볼루션 슬롯 - Full Post, a community of well-adapted individuals expands and eventually forms a whole new species.

Natural selection is an ongoing process that involves the interaction of three factors: variation, inheritance and reproduction. Variation is caused by mutation and sexual reproduction both of which increase the genetic diversity within a species. Inheritance is the transfer of a person's genetic traits to the offspring of that person that includes recessive and dominant alleles. Reproduction is the process of generating viable, fertile offspring. This can be achieved by both asexual or sexual methods.

Natural selection is only possible when all these elements are in balance. For example when the dominant allele of a gene allows an organism to live and reproduce more often than the recessive one, the dominant allele will become more common within the population. However, if the allele confers an unfavorable survival advantage or reduces fertility, it will be eliminated from the population. This 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 offspring an organism can produce the more fit it is that is determined by its ability to reproduce itself and live. People with good traits, such as longer necks in giraffes or bright white color patterns in male peacocks are more likely survive and produce offspring, which means they will make up the majority of the population in the future.

Natural selection is only a factor in populations and not on individuals. This is a crucial distinction from the Lamarckian evolution theory, which states that animals acquire traits through usage or inaction. If a giraffe stretches its neck to catch prey and the neck grows longer, then its offspring will inherit this characteristic. The differences in neck size between generations will continue to grow until the giraffe becomes unable to breed with other giraffes.

Evolution by Genetic Drift

In genetic drift, alleles within a gene can be at different frequencies within a population through random events. At some point, 무료에볼루션 only one of them will be fixed (become widespread enough to not longer be eliminated through natural selection), and the other alleles will drop in frequency. In extreme cases it can lead to one allele dominance. Other alleles have been virtually eliminated and heterozygosity diminished to zero. In a small group, this could lead to the complete elimination of recessive alleles. This scenario is called a bottleneck effect, and it is typical of evolutionary process that occurs when a large amount of individuals migrate to form a new group.

A phenotypic bottleneck can also occur when survivors of a disaster such as an epidemic or 에볼루션 바카라 사이트 a massive hunting event, are condensed into a small area. The survivors will be largely homozygous for the dominant allele, which means that they will all share the same phenotype and therefore have the same fitness traits. This situation could be caused by earthquakes, war or even plagues. Whatever the reason the genetically distinct group that remains is prone to genetic drift.

Walsh Lewens, Walsh, and Ariew define drift as a departure from the expected values due to differences in fitness. They provide a well-known example of twins that are genetically identical, share the exact same phenotype and yet one is struck by lightning and dies, whereas the other lives and reproduces.

This type of drift is crucial in the evolution of the species. It is not the only method for evolution. Natural selection is the most common alternative, in which mutations and migration keep phenotypic diversity within a population.

Stephens claims that there is a vast difference between treating drift like a force or cause, and treating other causes like selection mutation and migration as forces and causes. He argues that a causal process explanation of drift permits us to differentiate it from these other forces, and this distinction is vital. He also argues that drift has a direction: that is it tends to eliminate heterozygosity. It also has a specific magnitude which is determined by the size of population.

Evolution by Lamarckism

Biology students in high school are frequently introduced to Jean-Baptiste Lamarck's (1744-1829) work. His theory of evolution is generally referred to as "Lamarckism" and it states that simple organisms grow into more complex organisms through the inherited characteristics that are a result of the natural activities of an organism usage, use and disuse. Lamarckism can be illustrated by the giraffe's neck being extended to reach higher branches in the trees. This would result in giraffes passing on their longer necks to their offspring, who then get taller.

Lamarck Lamarck, a French Zoologist, introduced a revolutionary concept in his 17 May 1802 opening lecture at the Museum of Natural History of Paris. He challenged traditional thinking about organic transformation. According to Lamarck, living creatures evolved from inanimate material through a series of gradual steps. Lamarck was not the only one to suggest that this might be the case, but his reputation is widely regarded as being the one who gave the subject its first general and thorough treatment.

The prevailing story is that Lamarckism was an opponent to Charles Darwin's theory of evolution by natural selection, and both theories battled out in the 19th century. Darwinism eventually prevailed, leading to the development of what biologists refer to as the Modern Synthesis. The Modern Synthesis theory denies the possibility that acquired traits can be acquired through inheritance and instead, it argues that organisms develop through the selective action of environmental factors, such as natural selection.

Lamarck and his contemporaries endorsed the notion that acquired characters could be passed on to future generations. However, this notion was never a major part of any of their evolutionary theories. This is due to the fact that it was never scientifically validated.

But it is now more than 200 years since Lamarck was born and in the age of genomics there is a huge body of evidence supporting the possibility of inheritance of acquired traits. This is also known as "neo Lamarckism", or more commonly epigenetic inheritance. This is a model that is just as valid as the popular Neodarwinian model.

Evolution through the process of adaptation

One of the most commonly-held misconceptions about evolution is being driven by a fight for survival. This is a false assumption and overlooks other forces that drive evolution. The struggle for survival is more precisely described as a fight to survive within a specific environment, which could include not just other organisms, but also the physical environment itself.

Understanding the concept of adaptation is crucial to comprehend evolution. Adaptation is any feature that allows living organisms to live in its environment and reproduce. It could be a physical structure, like fur or feathers. It could also be a characteristic of behavior that allows you to move to the shade during the heat, or coming out to avoid the cold at night.

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 needs to have the right genes to generate offspring, and it should be able to locate enough food and other resources. The organism should be able to reproduce at the rate that is suitable for its specific niche.

These factors, along with mutation and gene flow, lead to a change in the proportion of alleles (different types of a gene) in the gene pool of a population. As time passes, this shift in allele frequencies can result in the emergence of new traits, and eventually new species.

Many of the characteristics we admire about animals and plants are adaptations, 에볼루션 바카라사이트 for example, lung or 에볼루션 게이밍 gills for removing oxygen from the air, fur or feathers to protect themselves long legs to run away from predators, and camouflage for hiding. To comprehend adaptation, it is important to differentiate between physiological and behavioral traits.

Physical characteristics like large gills and thick fur are physical characteristics. The behavioral adaptations aren't, such as the tendency of animals to seek out companionship or move into the shade during hot temperatures. It is important to note that insufficient planning does not make an adaptation. In fact, a failure to think about the consequences of a choice can render it ineffective even though it may appear to be logical or even necessary.