15 Best Documentaries About Free Evolution

What is Free Evolution?

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

This has been demonstrated by numerous examples such as the stickleback fish species that can live in saltwater or fresh water and walking stick insect varieties that are apprehensive about particular host plants. These typically reversible traits are not able to explain fundamental changes to the body's basic plans.

Evolution by Natural Selection

The evolution of the myriad living creatures on Earth is an enigma that has intrigued scientists for centuries. Charles Darwin's natural selection theory is the most well-known explanation. This process occurs when individuals who are better-adapted are able to reproduce faster and longer than those who are less well-adapted. Over time, a community of well-adapted individuals expands and eventually becomes a new species.

Natural selection is an ongoing process that involves the interaction of three factors including inheritance, variation, and 에볼루션 바카라 사이트 reproduction. Sexual reproduction and mutation increase the genetic diversity of a species. Inheritance is the term used to describe the transmission of a person's genetic traits, including both dominant and recessive genes, to their offspring. Reproduction is the production of fertile, viable offspring, which includes both sexual and asexual methods.

All of these variables have to be in equilibrium for natural selection to occur. If, for example the dominant gene allele makes an organism reproduce and last longer than the recessive gene The dominant allele will become more prevalent in a group. But if the allele confers an unfavorable survival advantage or decreases fertility, it will be eliminated from the population. This process is self-reinforcing meaning that an organism with an adaptive trait will live and reproduce far more effectively than those with a maladaptive feature. The more offspring an organism produces the better its fitness which is measured by its capacity to reproduce itself and live. People with desirable traits, like a long neck in Giraffes, or the bright white color patterns on male peacocks are more likely to others to reproduce and survive and eventually lead to them becoming the majority.

Natural selection is only a factor in populations and not on individuals. This is a major distinction from the Lamarckian theory of evolution, which states that animals acquire traits through use or disuse. If a giraffe stretches its neck to catch prey and the neck grows longer, then its offspring will inherit this trait. The differences in neck size between generations will continue to increase until the giraffe is no longer able to breed with other giraffes.

Evolution through Genetic Drift

In genetic drift, the alleles of a gene could attain different frequencies in a group due to random events. Eventually, only one will be fixed (become common enough to no longer be eliminated by natural selection), and the rest of the alleles will drop in frequency. In extreme cases it can lead to dominance of a single allele. The other alleles are essentially eliminated, and heterozygosity is reduced to zero. In a small number of people this could lead to the complete elimination of the recessive gene. This is called a bottleneck effect, and it is typical of the kind of evolutionary process when a large amount of individuals move to form a new population.

A phenotypic bottleneck may also occur when survivors of a disaster such as an outbreak or a mass hunting incident are concentrated in the same area. The surviving individuals will be largely homozygous for the dominant allele which means that they will all share the same phenotype and will thus have the same fitness traits. This could be caused by war, earthquakes or even a plague. Regardless of the cause the genetically distinct population that is left might be prone to genetic drift.

Walsh Lewens and Ariew utilize a "purely outcome-oriented" definition of drift as any deviation from expected values for 에볼루션 슬롯게임 variations in fitness. They provide a well-known instance of twins who are genetically identical and have identical phenotypes, and yet one is struck by lightening and 에볼루션 dies while the other lives and reproduces.

This type of drift is vital to the evolution of an entire species. However, it is not the only method to progress. The primary alternative is a process known as natural selection, in which phenotypic variation in the population is maintained through mutation and migration.

Stephens asserts that there is a major difference between treating the phenomenon of drift as a force, or an underlying cause, and considering other causes of evolution such as mutation, selection, and migration as forces or causes. He claims that a causal process explanation of drift allows us to distinguish it from the other forces, and this distinction is crucial. He also claims that drift is a directional force: that is, it tends to eliminate heterozygosity. He also claims that it also has a magnitude, 에볼루션바카라 that is determined by population size.

Evolution by Lamarckism

When high school students study biology, they are often introduced to the work of Jean-Baptiste Lamarck (1744 - 1829). His theory of evolution, often referred to as "Lamarckism which means that simple organisms develop into more complex organisms by inheriting characteristics that are a product of the use and abuse of an organism. Lamarckism can be demonstrated by the giraffe's neck being extended to reach higher levels of leaves in the trees. This would cause the longer necks of giraffes to be passed to their offspring, who would then grow even taller.

Lamarck, a French zoologist, presented a revolutionary concept in his opening lecture at the Museum of Natural History of Paris. He challenged the previous thinking on organic transformation. According to Lamarck, living things evolved from inanimate matter through a series of gradual steps. Lamarck was not the first to suggest that this might be the case, but he is widely seen as giving the subject its first broad and thorough treatment.

The predominant story is that Charles Darwin's theory on natural selection and Lamarckism fought in the 19th Century. Darwinism ultimately prevailed, leading 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.

While Lamarck believed in the concept of inheritance by acquired characters and his contemporaries also paid lip-service to this notion however, it was not a major feature in any of their evolutionary theories. This is partly due to the fact that it was never validated scientifically.

It's been over 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 referred to as "neo Lamarckism", or more generally epigenetic inheritance. It is a version of evolution that is just as valid as the more popular Neo-Darwinian theory.

Evolution through the process of 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 struggle for survival is more effectively described as a struggle to survive in a specific environment, which may involve not only other organisms but also the physical environment itself.

Understanding how adaptation works is essential to comprehend evolution. Adaptation refers to any particular characteristic that allows an organism to live and reproduce within its environment. It can be a physical feature, like feathers or fur. Or it can be a characteristic of behavior such as moving to the shade during the heat, or moving out to avoid the cold at night.

The ability of a living thing to extract energy from its environment and interact with other organisms as well as their physical environment, is crucial to its survival. The organism must possess the right genes to generate offspring, and it should be able to access enough food and other resources. Furthermore, the organism needs to be capable of reproducing itself at a high rate within its niche.

These factors, together with gene flow and mutation, lead to a change in the proportion of alleles (different types of a gene) in a population's gene pool. This shift in the frequency of alleles can result in the emergence of novel traits and eventually, new species as time passes.

Many of the features we find appealing in plants and animals are adaptations. For instance, lungs or gills that draw oxygen from air feathers and fur as insulation, long legs to run away from predators and camouflage for hiding. However, a proper understanding of adaptation requires a keen eye to the distinction between the physiological and behavioral characteristics.

Physical traits such as large gills and thick fur are physical characteristics. Behavior adaptations aren't, such as the tendency of animals to seek out companionship or move into the shade during hot temperatures. Furthermore it is important to note that a lack of thought does not make something an adaptation. In fact, failure to think about the consequences of a decision can render it unadaptable despite the fact that it appears to be sensible or even necessary.