The Reason Everyone Is Talking About Free Evolution Right Now > 자유게시판

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

What is Free Evolution?

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

This has been proven by many examples, including stickleback fish varieties that can live in fresh or 에볼루션사이트 saltwater and walking stick insect varieties that have a preference for particular host plants. These reversible traits cannot explain fundamental changes to the basic body plan.

Evolution through Natural Selection

The evolution of the myriad living organisms on Earth is an enigma that has intrigued scientists for many centuries. The best-established explanation is Darwin's natural selection process, an evolutionary process that occurs when better-adapted individuals survive and reproduce more successfully than those less well adapted. Over time, the population of well-adapted individuals grows and eventually forms an entirely new species.

Natural selection is an ongoing process that is characterized by the interaction of three factors that are inheritance, variation and reproduction. Variation is caused by mutations and sexual reproduction, both of which increase the genetic diversity of the species. Inheritance refers to the passing of a person's genetic characteristics to the offspring of that person which includes both recessive and dominant alleles. Reproduction is the process of producing fertile, viable offspring. This can be achieved via sexual or asexual methods.

All of these elements have to be in equilibrium to allow natural selection to take place. For example, if an allele that is dominant at a gene allows an organism to live and reproduce more frequently than the recessive allele, the dominant allele will be more common in the population. But if the allele confers a disadvantage in survival or reduces fertility, it will disappear from the population. The process is self reinforcing which means that the organism with an adaptive characteristic will live and reproduce more quickly than those with a maladaptive feature. The more offspring an organism produces the more fit it is which is measured by its ability to reproduce itself and survive. People with desirable traits, like a longer neck in giraffes, or bright white patterns of color in male peacocks are more likely survive and have offspring, which means they will eventually make up the majority of the population in the future.

Natural selection is an element in the population and not on individuals. This is a crucial distinction from the Lamarckian evolution theory, 에볼루션 바카라사이트 which states that animals acquire traits due to the use or absence of use. For instance, if a animal's neck is lengthened by stretching to reach for prey, its offspring will inherit a larger neck. The difference 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, 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 to no longer be eliminated by natural selection), and the other alleles will decrease in frequency. This can lead to a dominant allele at the extreme. The other alleles are eliminated, and heterozygosity falls to zero. In a small group, this could lead to the total elimination of the recessive allele. This scenario is called the bottleneck effect. It is typical of an evolutionary process that occurs when the number of individuals migrate to form a group.

A phenotypic 'bottleneck' can also occur when the survivors of a catastrophe such as an outbreak or mass hunt incident are concentrated in an area of a limited size. The remaining individuals will be mostly homozygous for 에볼루션 바카라 the dominant allele, meaning that they all have the same phenotype and will consequently have the same fitness traits. This could be caused by a war, earthquake, or even a plague. The genetically distinct population, if left, could be susceptible to genetic drift.

Walsh Lewens and Ariew use a "purely outcome-oriented" definition of drift as any deviation from the expected values of variations in fitness. They cite the famous example of twins who are both genetically identical and share the same phenotype. However one is struck by lightning and dies, while the other lives to reproduce.

This kind of drift can be crucial in the evolution of a species. It's not the only method for evolution. Natural selection is the primary alternative, in which mutations and migrations maintain the phenotypic diversity in the population.

Stephens asserts that there is a significant distinction between treating drift as a force or an underlying cause, and treating other causes of evolution such as mutation, selection, and migration as forces or causes. He claims that a causal process account of drift allows us to distinguish it from the other forces, and this distinction is vital. He also claims that drift has a direction, that is it tends to reduce heterozygosity. He also claims that it also has a size, which is determined by the size of the population.

Evolution by Lamarckism

When students in high school 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" is based on the idea that simple organisms evolve into more complex organisms by adopting traits that are a product of the organism's use and misuse. Lamarckism can be illustrated by the giraffe's neck being extended to reach higher branches in the trees. This process would cause giraffes to give their longer necks to their offspring, who then get taller.

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 May 1802, he introduced an original idea that fundamentally challenged the conventional wisdom about organic transformation. According Lamarck, living organisms evolved from inanimate material through a series of gradual steps. Lamarck was not the first to suggest that this might be the case, but his reputation is widely regarded as being the one who gave the subject its first broad and thorough treatment.

The most popular story is that Lamarckism was a rival to Charles Darwin's theory of evolution through natural selection and 에볼루션사이트 that the two theories battled each other in the 19th century. Darwinism ultimately prevailed which led to what biologists call the Modern Synthesis. The theory argues that traits acquired through evolution can be inherited, and instead suggests that organisms evolve through the selective action of environmental factors, like natural selection.

Lamarck and his contemporaries supported the idea 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 tested.

But it is now more than 200 years since Lamarck was born and in the age of genomics, there is a large amount of evidence to support the heritability of acquired characteristics. This is referred to as "neo Lamarckism", or more often epigenetic inheritance. This is a model that is just as valid as the popular Neodarwinian model.

Evolution through adaptation

One of the most common misconceptions about evolution is that it is driven by a type of struggle to survive. This notion is not true and ignores other forces driving evolution. The fight for survival is more accurately described as a struggle to survive in a particular environment. This could include not only other organisms but also the physical environment.

Understanding adaptation is important to comprehend evolution. It is a feature that allows a living thing to survive in its environment and reproduce. It can be a physical structure like feathers or 에볼루션 카지노 사이트 fur. Or it can be a characteristic of behavior, like moving into the shade during hot weather or escaping the cold at night.

The survival of an organism is dependent on its ability to draw energy from the environment and to interact with other organisms and their physical environments. The organism must possess the right genes to produce offspring and to be able to access enough food and resources. In addition, the organism should be capable of reproducing itself at an optimal rate within its environment.

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

Many of the features that we admire about animals and plants are adaptations, such as lung or gills for removing oxygen from the air, fur or feathers for insulation and long legs for running away from predators, and camouflage for hiding. To comprehend adaptation it is essential to differentiate between physiological and behavioral characteristics.

Physiological adaptations, such as thick fur or gills are physical characteristics, whereas behavioral adaptations, such as the desire to find companions or to retreat into the shade in hot weather, are not. It is important to remember that a the absence of planning doesn't make an adaptation. In fact, failure to think about the consequences of a behavior can make it unadaptive despite the fact that it may appear to be sensible or even necessary.