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10 Free Evolution-Friendly Habits To Be Healthy
What is Free Evolution?

Free evolution is the idea that the natural processes that organisms go through can lead them to evolve over time. This includes the evolution of new species as well as the transformation of the appearance of existing ones.

Many examples have been given of this, including different kinds of stickleback fish that can be found in salt or fresh water, and walking stick insect varieties that prefer particular host plants. These reversible traits however, are not able to explain fundamental changes in basic body plans.

Evolution through Natural Selection

Scientists have been fascinated by the evolution of all living creatures that live on our planet for ages. Charles Darwin's natural selection is the most well-known explanation. This happens when people who are more well-adapted are able to reproduce faster and longer than those who are less well-adapted. Over time, a population of well-adapted individuals expands and eventually becomes a new species.

Natural selection is a cyclical process that involves the interaction of three elements: variation, inheritance and reproduction. Mutation and sexual reproduction increase genetic diversity in the species. Inheritance refers to the transmission of genetic characteristics, which includes recessive and dominant genes, to their offspring. Reproduction is the process of producing fertile, viable offspring which includes both sexual and asexual methods.

All of these variables must be in harmony for natural selection to occur. For example, if an allele that is dominant at a gene allows an organism to live and reproduce more frequently than the recessive one, the dominant allele will become more prevalent within the population. However, if the allele confers an unfavorable survival advantage or decreases fertility, it will disappear from the population. The process is self-reinforced, meaning that a species that has a beneficial trait is more likely to survive and reproduce than an individual with an unadaptive trait. The more offspring an organism produces the better its fitness which is measured by its capacity to reproduce itself and live. People with desirable characteristics, such as a long neck in Giraffes, or the bright white patterns on male peacocks are more likely to others to live and reproduce which eventually leads to them becoming the majority.

Natural selection only affects populations, not individual organisms. This is a crucial distinction from the Lamarckian theory of evolution which holds that animals acquire traits due to usage or inaction. If a giraffe extends its neck in order to catch prey and the neck grows longer, then its children will inherit this characteristic. The length difference between generations will continue until the giraffe's neck becomes so long that it can not breed with other giraffes.

Evolution by Genetic Drift

In the process of genetic drift, alleles of a gene could reach different frequencies in a population due to random events. At some point, one will attain fixation (become so common that it is unable to be removed by natural selection), while the other alleles drop to lower frequencies. In the extreme it can lead to dominance of a single allele. The other alleles are essentially eliminated, and heterozygosity falls to zero. In a small population, this could lead to the total elimination of recessive allele. This is called a bottleneck effect, and it is typical of evolutionary process that occurs when a large amount of individuals move to form a new group.

A phenotypic bottleneck can also occur when the survivors of a catastrophe such as an outbreak or a mass hunting event are concentrated in the same area. The survivors are likely to be homozygous for the dominant allele, which means that they will all have the same phenotype and consequently have the same fitness traits. This may be caused by war, earthquake or even a disease. The genetically distinct population, if it is left vulnerable to genetic drift.

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

This kind of drift could play a significant role in the evolution of an organism. But, it's not the only method to develop. Natural selection is the most common alternative, where mutations and migration maintain the phenotypic diversity in a population.


Stephens claims that there is a significant distinction between treating drift as a force, or an underlying cause, and considering other causes of evolution, such as selection, mutation, and migration as forces or causes. Stephens claims that a causal process model of drift allows us to differentiate it from other forces, and this distinction is crucial. He also argues that drift is a directional force: that is it tends to reduce heterozygosity. He also claims that it also has a size, that is determined by population size.

Evolution through Lamarckism

Biology students in high school are frequently introduced to Jean-Baptiste Lemarck's (1744-1829) work. His theory of evolution is commonly referred to as "Lamarckism" and it states that simple organisms develop into more complex organisms through the inheritance of characteristics that result from an organism's natural activities usage, use and disuse. Lamarckism is illustrated through the giraffe's neck being extended to reach higher branches in the trees. This causes the longer necks of giraffes to be passed onto their offspring who would then grow even 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 of May in 1802, he presented an innovative concept that completely challenged the conventional wisdom about organic transformation. According to him, living things had evolved from inanimate matter via a series of gradual steps. Lamarck was not the only one to suggest that this could be the case, but his reputation is widely regarded as having given the subject its first broad and comprehensive analysis.

The most popular story is that Lamarckism was a rival to Charles Darwin's theory of evolutionary natural selection and both theories battled it out in the 19th century. Darwinism ultimately won and led to what biologists call the Modern Synthesis. The Modern Synthesis theory denies 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 his contemporaries offered a few words about this idea but it was not an integral part of any of their theories about evolution. This is largely due to the fact that it was never tested scientifically.

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

Evolution through the process of adaptation

One of the most common misconceptions about evolution is its being driven by a struggle for survival. This view is inaccurate and ignores other forces driving evolution. The fight for survival can be more accurately described as a struggle to survive in a specific environment. This may include not just other organisms but also the physical environment itself.

Understanding how adaptation works is essential to comprehend evolution. It is a feature that allows a living organism to live in its environment and reproduce. It could be a physical structure, such as feathers or fur. Or it can be a characteristic of behavior that allows you to move to the shade during hot weather or escaping the cold at night.

에볼루션 바카라 무료 depends on its ability to obtain energy from the environment and interact with other living organisms and their physical surroundings. The organism needs to have the right genes to create offspring, and must be able to find enough food and other resources. The organism must also be able to reproduce at an amount that is appropriate for its specific niche.

These elements, in conjunction with gene flow and mutation can result in an alteration in the percentage of alleles (different varieties of a particular gene) in the population's gene pool. As time passes, this shift in allele frequencies can result in the development of new traits and ultimately new species.

Many of the features that we admire in animals and plants are adaptations, for example, lung or gills for removing oxygen from the air, fur or feathers to provide insulation and long legs for running away from predators and camouflage to hide. To understand the concept of adaptation, it is important to discern between physiological and behavioral characteristics.

Physical characteristics like thick fur and gills are physical characteristics. The behavioral adaptations aren't, such as the tendency of animals to seek companionship or move into the shade in hot temperatures. Furthermore it is important to remember that a lack of thought does not mean that something is an adaptation. In fact, a failure to consider the consequences of a decision can render it unadaptive even though it may appear to be reasonable or even essential.

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