15 Documentaries That Are Best About Free Evolution

What is Free Evolution?

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

This has been proven by numerous examples, including stickleback fish varieties that can live in salt or fresh water, and walking stick insect species that are apprehensive about specific host plants. These mostly reversible trait permutations, however, cannot be the reason for fundamental changes in body plans.

Evolution by Natural Selection

The development of the myriad of living organisms on Earth is an enigma that has fascinated scientists for 에볼루션카지노 many centuries. Charles Darwin's natural selection theory is the best-established explanation. This process occurs when individuals who are better-adapted have more success in reproduction and survival than those who are less well-adapted. Over time, a population of well adapted individuals grows and eventually forms a whole new species.

Natural selection is a process that is cyclical and involves the interaction of 3 factors: variation, reproduction and inheritance. Variation is caused by mutations and sexual reproduction, both of which increase the genetic diversity of a species. Inheritance refers the transmission of a person’s genetic characteristics, which includes both dominant and recessive genes, to their offspring. Reproduction is the process of producing fertile, viable offspring. This can be done by both asexual or sexual methods.

All of these factors have to be in equilibrium to allow natural selection to take place. If, for instance the dominant gene allele allows an organism to reproduce and live longer than the recessive allele The dominant allele becomes more prevalent in a population. But if the allele confers a disadvantage in survival or decreases fertility, it will be eliminated from the population. This process is self-reinforcing which means that an organism with a beneficial trait is more likely to survive and reproduce than one with an unadaptive trait. The greater an organism's fitness, 무료 에볼루션 measured by its ability reproduce and survive, is the more offspring it produces. People with desirable traits, like the long neck of the giraffe, or bright white patterns on male peacocks are more likely to others to reproduce and 에볼루션코리아 survive and eventually lead to them becoming the majority.

Natural selection is only a force for populations, not on individuals. This is a significant distinction from the Lamarckian theory of evolution which holds that animals acquire traits due to use or lack of use. If a giraffe expands its neck in order to catch prey and its neck gets longer, then the children will inherit this characteristic. The difference 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, alleles within a gene can reach different frequencies in a group through random events. At some point, only one of them will be fixed (become common enough to no longer be eliminated by natural selection), and the other alleles will drop in frequency. In the extreme 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 total elimination of recessive alleles. This scenario is called a bottleneck effect, and it is typical of the kind of evolutionary process that occurs when a large number of people migrate to form a new population.

A phenotypic bottleneck could occur when the survivors of a catastrophe, such as an epidemic or a massive hunting event, are condensed into a small area. The survivors will have an allele that is dominant and will have the same phenotype. This may be caused by a conflict, earthquake, or even a plague. The genetically distinct population, if it remains, 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 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, whereas the other lives to reproduce.

This type of drift can play a significant role in the evolution of an organism. It is not the only method for evolution. Natural selection is the most common alternative, in which mutations and migration keep the phenotypic diversity in the population.

Stephens claims 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 argues that a causal process explanation of drift allows us to distinguish it from other forces, and this distinction is vital. He further argues that drift is a directional force: that is it tends to eliminate heterozygosity. It also has a magnitude, that is determined by population size.

Evolution through Lamarckism

In high school, students study biology, they are often introduced to the work of Jean-Baptiste Lamarck (1744 - 1829). His theory of evolution is commonly called "Lamarckism" and it asserts that simple organisms evolve into more complex organisms by the inherited characteristics that result from the organism's natural actions use and misuse. Lamarckism is typically illustrated with the image of a giraffe extending its neck to reach leaves higher up in the trees. This could cause the necks of giraffes that are longer to be passed onto their offspring who would then become taller.

Lamarck was a French zoologist and, in his inaugural 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 to Lamarck, living things evolved from inanimate material through a series gradual steps. Lamarck wasn't the only one to make this claim but he was regarded as the first to give the subject a comprehensive and 에볼루션 코리아 general treatment.

The prevailing story is that Lamarckism was an opponent to Charles Darwin's theory of evolution through natural selection and 바카라 에볼루션 (Mdwrite blog post) that the two theories battled each other in the 19th century. Darwinism eventually triumphed, leading to the development of what biologists refer to as the Modern Synthesis. The theory argues that acquired traits can be passed down through generations and instead argues that organisms evolve through the selective action of environment factors, including 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 central part of any of their theories about evolution. This is partly due to the fact that it was never validated scientifically.

It's been more than 200 year since Lamarck's birth, and in the age genomics there is a growing evidence-based body of evidence to support the heritability-acquired characteristics. This is also known as "neo Lamarckism", or more generally epigenetic inheritance. It is a form of evolution that is as valid as the more well-known Neo-Darwinian model.

Evolution through Adaptation

One of the most popular misconceptions about evolution is that it is driven by a sort of struggle to survive. This is a false assumption and ignores other forces driving evolution. The fight for survival can be more accurately described as a struggle to survive within a specific environment, which may be a struggle that involves not only other organisms but also the physical environment itself.

To understand how evolution functions it is important to think about what adaptation is. Adaptation refers to any particular characteristic that allows an organism to live and reproduce in its environment. It could be a physical structure, like fur or feathers. Or it can be a behavior trait, like moving into the shade during hot weather or coming out to avoid the cold at night.

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

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

Many of the features that we admire about animals and plants are adaptations, like lungs or gills to extract oxygen from the air, fur or feathers to provide insulation, long legs for running away from predators, and camouflage to hide. However, a thorough understanding of adaptation requires a keen eye to the distinction between physiological and behavioral characteristics.

Physiological traits like the thick fur and gills are physical traits. The behavioral adaptations aren't an exception, for instance, the tendency of animals to seek companionship or retreat into shade in hot temperatures. In addition, it is important to remember that a lack of forethought does not make something an adaptation. Failure to consider the effects of a behavior, even if it appears to be rational, could make it inflexible.