What is Free Evolution?

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

Numerous examples have been offered of this, including different varieties of stickleback fish that can live in salt or fresh water, as well as walking stick insect varieties that prefer particular host plants. These are mostly reversible traits, however, cannot explain fundamental changes in body plans.

Evolution by Natural Selection

Scientists have been fascinated by the development of all the living organisms that inhabit our planet for ages. Charles Darwin's natural selectivity is the best-established explanation. This happens when people who are more well-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 three factors: variation, reproduction and inheritance. Mutation and sexual reproduction increase the genetic diversity of a species. Inheritance is the transfer of a person's genetic traits to their offspring, 에볼루션사이트 which includes both recessive and dominant alleles. Reproduction is the process of generating viable, fertile offspring. This can be done by both asexual or sexual methods.

All of these factors must be in harmony for natural selection to occur. If, for example, a dominant gene allele causes an organism reproduce and live longer than the recessive gene allele then the dominant allele becomes more prevalent in a population. If the allele confers a negative survival advantage or decreases the fertility of the population, it will go away. This process is self-reinforcing meaning that a species with a beneficial characteristic will survive and reproduce more than an individual with a maladaptive characteristic. The greater an organism's fitness as measured by its capacity to reproduce and endure, is the higher number of offspring it produces. People with desirable characteristics, such as having a long neck in giraffes, or bright white color patterns on male peacocks are more likely to others to survive and reproduce and eventually lead to them becoming the majority.

Natural selection only affects populations, not individuals. This is a crucial distinction from the Lamarckian theory of evolution which holds that animals acquire traits either through the use or absence of use. If a giraffe expands its neck to reach prey, and the neck becomes longer, then the offspring will inherit this characteristic. The length difference between generations will persist until the giraffe's neck becomes too long that it can not breed with other giraffes.

Evolution by Genetic Drift

In genetic drift, the alleles within a gene can attain different frequencies in a population through random events. In the end, one will reach fixation (become so widespread that it can no longer be removed by natural selection) a