15 Great Documentaries 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 evolution of new species and the alteration of the appearance of existing ones.

This has been demonstrated by many examples such as the stickleback fish species that can thrive in fresh or saltwater and walking stick insect species that prefer specific host plants. These are mostly reversible traits, however, cannot explain fundamental changes in body plans.

Evolution through Natural Selection

Scientists have been fascinated by the development of all living creatures that live on our planet for centuries. The most widely accepted explanation is that of Charles Darwin's natural selection, which occurs when individuals that are better adapted survive and reproduce more successfully than those less well-adapted. Over time, a population of well adapted individuals grows and eventually creates a new species.

Natural selection is a cyclical process that involves the interaction of three elements that are inheritance, variation and reproduction. Variation is caused by mutations and sexual reproduction both of which increase the genetic diversity of the species. Inheritance refers to the transmission of a person’s genetic traits, including recessive and dominant genes to their offspring. Reproduction is the process of creating viable, fertile offspring. This can be done through sexual or asexual methods.

All of these factors must be in harmony for natural selection to occur. For example, if an allele that is dominant at one gene can cause an organism to live and reproduce more often than the recessive one, the dominant allele will be more common within the population. However, if the gene confers a disadvantage in survival or reduces fertility, it will be eliminated from the population. This process is self-reinforcing meaning that an organism that has an adaptive trait will live and reproduce more quickly than those with a maladaptive feature. The more fit an organism is which is measured by its ability to reproduce and survive, is the greater number of offspring it produces. People with good traits, like a long neck in the giraffe, 무료에볼루션 or bright white patterns on male peacocks are more likely than others to reproduce and survive, which will eventually lead to them becoming the majority.

Natural selection only acts on populations, not on individuals. This is a major distinction from the Lamarckian theory of evolution, which states that animals acquire traits due to usage or inaction. For instance, if the Giraffe's neck grows longer due to stretching to reach prey its offspring will inherit a more long neck. The difference in neck length between generations will persist until the giraffe's neck becomes too long that it can no longer breed with other giraffes.

Evolution by Genetic Drift

In genetic drift, alleles of a gene could attain different frequencies within a population by chance events. At some point, one will reach fixation (become so widespread that it is unable to be removed through natural selection), while other alleles will fall to lower frequency. This can lead to a dominant allele in the extreme. The other alleles are essentially eliminated, and heterozygosity falls to zero. In a small population it could lead to the complete elimination of the recessive allele. This is known as the bottleneck effect and is typical of the evolution process that occurs when an enormous number of individuals move to form a population.

A phenotypic 'bottleneck' can also occur when survivors of a disaster like an outbreak or mass hunting event are concentrated in the same area. The survivors will carry a dominant allele and thus will share the same phenotype. This may be the result of a war, earthquake, or even a plague. Regardless of the cause, the genetically distinct population that remains could be susceptible to genetic drift.

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

This type of drift is crucial in the evolution of an entire species. It's not the only method of evolution. The primary alternative is a process known as natural selection, in which the phenotypic diversity of the population is maintained through mutation and migration.

Stephens asserts that there is a vast difference between treating the phenomenon of drift as an actual cause or force, and treating other causes like selection mutation and migration as forces and causes. Stephens claims that a causal mechanism account of drift permits us to differentiate it from the other forces, and this distinction is crucial. He further argues that drift is a directional force: that is it tends to reduce heterozygosity, and that it also has a size, that is determined by the size of population.

Evolution through Lamarckism

Biology students in high school are frequently introduced to Jean-Baptiste Lamarck's (1744-1829) work. His theory of evolution is commonly referred to as "Lamarckism" and it states that simple organisms grow into more complex organisms by the inheritance of traits that are a result of an organism's natural activities use and misuse. Lamarckism can be demonstrated by an giraffe's neck stretching to reach higher leaves in the trees. This could result in giraffes passing on their longer necks to offspring, 에볼루션 게이밍 슬롯 (click through the following website page) which then get taller.

Lamarck the French Zoologist, introduced a revolutionary concept in his opening lecture at the Museum of Natural History of Paris. He challenged previous thinking on organic transformation. According to Lamarck, living creatures evolved from inanimate matter by a series of gradual steps. Lamarck was not the first to suggest that this might be the case, but the general consensus is that he was the one being the one who gave the subject his first comprehensive and thorough treatment.

The popular narrative is that Lamarckism became a rival to Charles Darwin's theory of evolution by natural selection and both theories battled it out in the 19th century. Darwinism ultimately won, leading to what biologists refer to as the Modern Synthesis. The theory argues that acquired traits can be passed down through generations and instead argues organisms evolve by the selective action of environment factors, including Natural Selection.

Lamarck and his contemporaries supported the notion that acquired characters could be passed down to the next generation. However, this concept was never a major part of any of their evolutionary theories. This is due in part 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 to support the heritability of acquired characteristics. This is sometimes called "neo-Lamarckism" or more often, epigenetic inheritance. It is a version of evolution that is just as valid as the more well-known Neo-Darwinian theory.

Evolution by the process of adaptation

One of the most common misconceptions about evolution is being driven by a struggle to survive. This view is inaccurate and 에볼루션 카지노 사이트 overlooks the other forces that drive evolution. The fight for survival is better described as a struggle to survive in a particular environment. This could include not just other organisms as well as the physical environment.

To understand how evolution functions it is beneficial to think about what adaptation is. The term "adaptation" refers to any specific characteristic that allows an organism to live and reproduce within its environment. It can be a physical structure, like fur or feathers. Or it can be a behavior trait that allows you to move into the shade during hot weather or coming out to avoid the cold at night.

The survival of an organism is dependent on its ability to draw energy from the surrounding environment and interact with other organisms and their physical environments. The organism must have the right genes to create offspring, and it must be able to locate enough food and other resources. Furthermore, the organism needs to be able to reproduce itself in a way that is optimally within its niche.

These factors, along with mutation and gene flow, lead to a change in the proportion of alleles (different forms of a gene) in a 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 about animals and plants are adaptations, like lungs or gills to extract oxygen from the air, feathers or fur to protect themselves and long legs for running away from predators and camouflage to hide. To understand adaptation it is crucial to distinguish between behavioral and physiological characteristics.

Physical characteristics like the thick fur and gills are physical characteristics. The behavioral adaptations aren't, such as the tendency of animals to seek out companionship or move into the shade in hot temperatures. It is also important to keep in mind that the absence of planning doesn't make an adaptation. In fact, a failure to think about the consequences of a behavior can make it unadaptable, despite the fact that it appears to be logical or even necessary.