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What is Free Evolution?

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

This is evident in numerous examples such as the stickleback fish species that can thrive in fresh or saltwater and walking stick insect varieties that are apprehensive about particular host plants. These are mostly reversible traits, however, cannot explain fundamental changes in body plans.

Evolution by Natural Selection

Scientists have been fascinated by the development of all living creatures that live on our planet for ages. The most widely accepted explanation is Darwin's natural selection, a process that is triggered when more well-adapted individuals live longer and reproduce more effectively than those that are less well adapted. Over time, 무료에볼루션 a community of well-adapted individuals expands and 에볼루션 무료 바카라사이트 (your domain name) eventually creates a new species.

Natural selection is an ongoing process that is characterized by the interaction of three factors including inheritance, variation, and reproduction. Sexual reproduction and mutations increase the genetic diversity of the species. Inheritance refers to the transmission of a person's genetic characteristics, which includes recessive and dominant genes and their offspring. Reproduction is the generation of fertile, viable offspring, which includes both sexual and 무료에볼루션 asexual methods.

Natural selection is only possible when all the factors are in balance. For example, if the dominant allele of the gene allows an organism to live and reproduce more often than the recessive one, the dominant allele will become more common within the population. If the allele confers a negative advantage to survival or decreases the fertility of the population, it will disappear. The process is self-reinforcing meaning that an organism that has an adaptive trait will survive and reproduce far more effectively than those with a maladaptive trait. The more offspring an organism can produce, the greater its fitness, which is measured by its capacity to reproduce itself and live. People with desirable traits, such as longer necks in giraffes and bright white patterns of color in male peacocks are more likely to survive and produce offspring, and thus will become the majority of the population in the future.

Natural selection is an aspect of populations and not on individuals. This is a major distinction from the Lamarckian theory of evolution which argues that animals acquire traits through use or disuse. For instance, if a animal's neck is lengthened by stretching to reach for prey, its offspring will inherit a longer neck. The length difference between generations will continue until the giraffe's neck becomes too long to no longer breed with other giraffes.

Evolution through Genetic Drift

In genetic drift, alleles within a gene can reach different frequencies in a population by chance events. In the end, only one will be fixed (become common enough to no more be eliminated through natural selection) and 에볼루션 바카라 무료체험 the other alleles will decrease in frequency. This can lead to a dominant allele in extreme. The other alleles are virtually eliminated and heterozygosity diminished to zero. In a small population this could result in the total elimination of recessive allele. This is known as the bottleneck effect and 에볼루션사이트 is typical of an evolution process that occurs when the number of individuals migrate to form a group.

A phenotypic bottleneck may occur when the survivors of a disaster such as an epidemic or a mass hunting event, are concentrated in a limited area. The survivors will carry an allele that is dominant and will share the same phenotype. This situation could be caused by war, earthquakes, or even plagues. Whatever the reason the genetically distinct population that remains is prone to genetic drift.

Walsh, Lewens, and Ariew use a "purely outcome-oriented" definition of drift as any deviation from the expected values for differences in fitness. They give a famous example of twins that are genetically identical and have identical phenotypes and yet one is struck by lightning and dies, while the other lives and reproduces.

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

Stephens asserts that there is a big distinction between treating drift as a force, 에볼루션 블랙잭 or a cause and treating other causes of evolution such as selection, mutation, and migration as forces or causes. Stephens claims that a causal process explanation of drift permits us to differentiate it from other forces, and 에볼루션사이트 this distinction is crucial. He further argues 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 through 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, also referred to as "Lamarckism, states that simple organisms transform into more complex organisms by taking on traits that result from the organism's use and misuse. Lamarckism is illustrated through a giraffe extending its neck to reach higher leaves in the trees. This causes giraffes' longer necks to be passed on to their offspring who would then become taller.

Lamarck Lamarck, a French Zoologist from France, presented an idea that was revolutionary in his opening lecture at the Museum of Natural History of Paris. He challenged traditional thinking about organic transformation. According to Lamarck, living things evolved from inanimate material by a series of gradual steps. Lamarck wasn't the only one to make this claim but he was considered to be the first to offer the subject a comprehensive and general treatment.

The dominant story is that Charles Darwin's theory on evolution by natural selection and Lamarckism were competing in the 19th century. Darwinism ultimately prevailed and led to what biologists refer to as the Modern Synthesis. This theory denies acquired characteristics are passed down from generation to generation and instead argues that organisms evolve through the influence of environment factors, such as Natural Selection.

Lamarck and his contemporaries endorsed the idea that acquired characters could be passed down to future generations. However, this notion was never a key element of any of their theories about evolution. This is partly due to the fact that it was never tested scientifically.

It has been more than 200 year since Lamarck's birth, and in the age genomics, there is an increasing body of evidence that supports the heritability acquired characteristics. 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 by Adaptation

One of the most widespread misconceptions about evolution is that it is driven by a type of struggle for survival. This is a false assumption and overlooks other forces that drive evolution. The fight for survival can be more accurately described as a struggle to survive in a specific environment. This could include not just other organisms but also the physical environment.

To understand how evolution works it is beneficial to understand what is adaptation. It refers to a specific characteristic that allows an organism to survive and reproduce in its environment. It can be a physical structure, like fur or feathers. Or it can be a characteristic of behavior that allows you to move into the shade during hot weather or moving out to avoid the cold at night.

An organism's survival depends on its ability to obtain energy from the surrounding environment and interact with other organisms and their physical environments. The organism should possess the right genes to create offspring and to be able to access sufficient food and resources. In addition, the organism should be able to reproduce itself in a way that is optimally within its environmental niche.

These factors, along with mutation and gene flow, lead to 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 result in the development of new traits, and eventually new species.

Many of the characteristics we admire in animals and plants are adaptations, for example, the lungs or gills that extract oxygen from the air, feathers or fur to protect themselves, long legs for running away from predators and camouflage to hide. However, a complete understanding of adaptation requires paying attention to the distinction between physiological and behavioral traits.

Physiological adaptations, such as thick fur or gills, are physical characteristics, whereas behavioral adaptations, such as the tendency to seek out companions or to retreat to the shade during hot weather, are not. Additionally it is important to understand that a lack of thought does not make something an adaptation. In fact, failing to consider the consequences of a decision can render it unadaptable even though it might appear reasonable or even essential.