15 Best Documentaries On Free Evolution

What is Free Evolution?

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

This has been demonstrated by many examples such as the stickleback fish species that can thrive in fresh or saltwater and walking stick insect types that prefer specific host plants. These typically reversible traits cannot explain fundamental changes to the body's basic plans.

Evolution by 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 that of Charles Darwin's natural selection process, a process that occurs when individuals that are better adapted survive and reproduce more effectively than those who are less well-adapted. Over time, a population of well-adapted individuals increases and eventually becomes a new species.

Natural selection is an ongoing process and involves the interaction of 3 factors that are: reproduction, variation and inheritance. Sexual reproduction and mutations increase the genetic diversity of an animal species. Inheritance refers to the passing of a person's genetic traits to their offspring that includes dominant and recessive alleles. Reproduction is the production of viable, fertile offspring, which includes both sexual and asexual methods.

Natural selection can only occur when all these elements are in balance. If, for example, a dominant gene allele allows an organism to reproduce and last longer than the recessive gene allele The dominant allele will become more prevalent in a population. If the allele confers a negative advantage to survival or decreases the fertility of the population, it will be eliminated. The process is self-reinforcing, which means that the organism with an adaptive trait will live and reproduce far more effectively than those with a maladaptive trait. The more offspring an organism produces the better its fitness which is measured by its ability to reproduce itself and live. People with desirable traits, like a long neck in the giraffe, or bright white patterns on male peacocks are more likely to others to reproduce and survive which eventually leads to them becoming the majority.

Natural selection is only an aspect of populations and not on individuals. This is a major distinction from the Lamarckian evolution theory, which states that animals acquire traits due to the use or absence of use. If a giraffe expands its neck to catch prey, and the neck becomes longer, then its offspring will inherit this characteristic. The difference in neck size between generations will continue to grow until the giraffe is no longer able to breed with other giraffes.

Evolution by Genetic Drift

Genetic drift occurs when alleles of the same gene are randomly distributed within a population. In the end, only one will be fixed (become common enough that it can no longer be eliminated by natural selection), and the other alleles drop in frequency. In extreme cases it can lead to dominance of a single allele. Other alleles have been basically eliminated and heterozygosity has been reduced to a minimum. In a small number of people this could lead to the complete elimination of recessive gene. This scenario is known as a bottleneck effect and it is typical of evolutionary process that takes place when a large amount of people migrate to form a new group.

A phenotypic bottleneck may also occur when the survivors of a catastrophe such as an outbreak or mass hunt event are confined to the same area. The surviving individuals will be mostly homozygous for the dominant allele meaning that they all share the same phenotype and therefore have the same fitness characteristics. This could be caused by a war, an earthquake or even a disease. Whatever the reason the genetically distinct population that remains could be prone to genetic drift.

Walsh Lewens, Lewens, and Ariew employ Lewens, Walsh, and Ariew use a "purely outcome-oriented" definition of drift as any departure from the expected values for differences in fitness. They cite the famous example of twins that are genetically identical and have exactly the same phenotype. However, one is struck by lightning and dies, but the other lives to reproduce.

This type of drift is vital to the evolution of the species. But, 에볼루션 바카라 사이트코리아 (Italianculture.Net) it's not the only way to progress. The main alternative is to use a process known as natural selection, where the phenotypic variation of a population is maintained by mutation and migration.

Stephens argues there is a huge distinction between treating drift as an agent or cause and treating other causes such as selection mutation and migration as forces and causes. Stephens claims that a causal process account of drift allows us distinguish it from other forces and this differentiation is crucial. He further argues that drift has both an orientation, i.e., it tends towards eliminating heterozygosity. It also has a size which is determined by the size of the population.

Evolution through Lamarckism

When students in high school study biology, they are often introduced to the work of Jean-Baptiste Lamarck (1744 - 1829). His theory of evolution is commonly known as "Lamarckism" and it states that simple organisms develop into more complex organisms via the inherited characteristics which result from the natural activities of an organism use and misuse. Lamarckism is usually illustrated with a picture of a giraffe stretching its neck longer to reach the higher branches in the trees. This process would cause giraffes to pass on their longer necks to offspring, which then grow even taller.

Lamarck Lamarck, a French zoologist, presented a revolutionary concept in his 17 May 1802 opening lecture at the Museum of Natural History of Paris. He challenged the conventional wisdom on organic transformation. According to Lamarck, living creatures evolved from inanimate material through a series gradual steps. Lamarck was not the only one to suggest that this could be the case but the general consensus is that he was the one being the one who gave the subject its first broad and comprehensive analysis.

The prevailing story is that Lamarckism was a rival to Charles Darwin's theory of evolutionary natural selection, and that the two theories fought out in the 19th century. Darwinism eventually prevailed and led to the creation of what biologists refer to as the Modern Synthesis. The theory denies that acquired characteristics are passed down from generation to generation and instead argues organisms evolve by the selective influence of environmental factors, such as Natural Selection.

Although Lamarck endorsed the idea of inheritance by acquired characters, and his contemporaries also offered a few words about this idea but it was not a major feature in any of their theories about evolution. This is due to the fact that it was never scientifically validated.

It's been over 200 years since the birth of Lamarck, and in the age genomics there is a growing body of evidence that supports the heritability of acquired traits. This is often referred to as "neo-Lamarckism" or, more often epigenetic inheritance. This is a version that is just as valid as the popular neodarwinian model.

Evolution through the process of adaptation

One of the most widespread misconceptions about evolution is that it is a result of a kind of struggle for survival. In reality, this notion misrepresents natural selection and ignores the other forces that drive evolution. The fight for survival can be more precisely described as a fight to survive within a specific environment, which could involve not only other organisms, but also the physical environment itself.

To understand how evolution works it is important to understand what is adaptation. It is a feature that allows living organisms to live in its environment and reproduce. It can be a physical structure such as feathers or fur. Or it can be a characteristic of behavior, like moving towards shade during hot weather or escaping the cold at night.

The capacity of an organism to draw energy from its environment and interact with other organisms, as well as their physical environment is essential to its survival. The organism must have the right genes for producing offspring, and be able to find enough food and resources. The organism should also be able reproduce at an amount that is appropriate for its niche.

These factors, together with mutations and gene flow can cause a shift in the proportion of different alleles in the population's gene pool. As time passes, this shift in allele frequency can lead to the emergence of new traits, and eventually new species.

Many of the characteristics we admire in animals and plants are adaptations. For instance, lungs or gills that extract oxygen from the air, 에볼루션 무료 바카라 fur and feathers as insulation long legs to run away from predators and 에볼루션 게이밍 camouflage to conceal. However, a thorough understanding of adaptation requires paying attention to the distinction between physiological and behavioral traits.

Physiological adaptations, like thick fur or gills, are physical characteristics, whereas behavioral adaptations, such as the desire to find companions or to move into the shade in hot weather, are not. In addition it is important to remember that lack of planning does not make something an adaptation. Inability to think about the implications of a choice, 에볼루션바카라사이트 even if it appears to be logical, can make it unadaptive.