Positive Natural Selection

Positive Natural Selection

Natural selection is an important process that has aided a lot in the survival of species. The process of natural selection deals with how some of the traits that are biologically determined become more manifested or less manifested in an organism as it adapts to the environment in which it lives in. The theory of natural selection is associated with Charles Darwin, who wanted to compare the process of natural selection with the process of artificial selection. The process of natural selection pertains to how animals adapt to different situations. According to this theory, animals have to adapt some features or characteristics that are favorable to the environmental situations in which they live in. organisms that fail to adapt favorable characteristics are unable to survive and with time they become extinct leaving only the animals with favorable traits. The process of natural selection is of great significance since it promotes desirable characteristics. This paper will lay a detailed account on the importance of the natural selection where I will also provide key examples of how natural selection is very helpful to animals.

At first, natural selection aids in the maintenance of established species. Natural selection poses as a perfect explanation of the observation that relate to breeding. In relation to Charles Darwin theory, it is very eminent that some traits are better off than others in some certain conditions. For example, some beaks are favorable than other beaks in an environment where the birds can only feed on nuts. Natural selection thus helps in explaining the variations in phenotypic expressions regarding various conditions. Natural selection offers descriptive opportunities and it also serves as a filter of the existing traits to ensure that only the desirable traits are manifested (Morgans and Ord 1241).

It is through the process of natural selection that the undesirable characteristics are eliminated completely, and only the strongest animals and plants are left to survive.  The natural selection adds pressure to the organism in a specific generation so that they can form a strong adaptation to the existing conditions. In the absence of positive selection, it will be very hard for positive traits that enhance the survival of the organism in varied environments to survive. In addition the process of positive selection also aids ensures that animals that cannot bear the pressure of the existing conditions do not dominate the population since the whole population will always be disadvantaged by the existing conditions. Positive natural selection thus helps in separating organism that has some negative traits and those that have some traits that are highly favored by the environment. It is through positive selection that animals that have some advantageous traits can survive and spread the traits to other offsprings because they are more adapted compared to other animals that do not have the traits (Morgans and Ord 1244).

Natural selection is thus a very imperative part of the evolution of organisms. It helps a lot in the creation of organism with completely new characteristics, and it enhances the transfer of the favorable traits to the future generation. The totality is continuity of life and prevention of extinction of animals endangered by some of the prevailing conditions (Morgans and Ord 1245).

Natural selection is the most useful process of evolution. It is through the process of natural selection that it is possible to explain some of the superficial modifications that exist in various animals. It is through natural selection that we have some animals with unique characteristics. For example animals such as the ducks have feet that are webbed. These features are not just for decoration. These unique features enable the ducks to live well in water.  The feet enable them to paddle in a smooth way, and they easily paddle out of the water. In addition, they do not have any nerves in their feet, and thus they can easily swim even in cold water. These unique characteristics are some of the benefits that emanate from the positive natural selection. Positive natural selection ensures that the animals have the most suitable traits that will enable them to survive in the existing conditions. Positive selection is also an excellent way of promoting fitness through enhancing the survival of animals with the most favorable traits even in situations where other animals can’t survive (Morgans and Ord 1245).

Natural selection can also be classified as the most important element of adaptation. In all the four components of adaptation, it is very eminent that all the elements are aimed at increasing fitness. For example, migration, and selection are all aimed at increasing fitness. It is very eminent that when animals migrate to a new region, the animals that are well suited for survival are the ones that survive. The former reinforces the importance of the process of natural selection in the survival of various spices. Natural selection is the dominant feature that enhances the adaptation of various living organisms to different environmental conditions. The process of natural selection is also known as the only process that promotes success in individuals, and it eliminates the failures (Morgans and Ord 1247).

Whenever a novel environment has been inhabited, one of the key factors that results in a lot of pressure is the predation. Predators have to adopt a favorable mechanism that will enable them to survive while the preys will also need mechanisms that will enable them to evade preys. The process of natural selection plays a very important role. For example, only carnivores that can run fast are better suited to catch preys, and they are the ones that will survive. Natural selection is thus a survival tactic of species in the fast evolving ecological environments (Morgans and Ord 1247).

The peppered moth presents an excellent example that can help in forming a clear understanding of how positive natural selection is very imperative in spices and how it aids in their survival. Before the time of the industrial revolution, the pale colored moths were very prevalent. They were well adapted to the existing environment since they could easily camouflage. On the other hand, the black colored moths were very rare since they were easily predated. Before the industrial revolution, it is very eminent that the pale colored moths were well fit for survival while the dark moths were not fit for survival. However, after the industrial revolution, there was a lot of pollution and the trees were covered with soot. The change in ecological conditions demanded new forms of adaptation so as to enhance survival. The dark moths were much favored by the new conditions, and they started to become more prevalent. The dark moths passed the traits to the future generations while the pale colored moths were preyed, and they reduced in numbers. This example reinforces how positive natural selection aids in ensuring that animals with the favorable conditions survive and pass the traits to their future generations (Morgans and Ord 1242).

Another example of how natural selection is important to animals is in the case of tree frogs. There are green tree frogs and the gray ones.  These frogs are often predated by snakes and birds. The green frogs survive well in green environments because they are well camouflaged while the gray ones can’t survive in such environments. Natural selection helps in placing an animal in a condition where they are best suited (Morgans and Ord 1241).

Domesticating animals is not good at all. When animals are domesticated, they become dependent on human beings.  They depend on human beings for food and all other requirements. They live in an environment that they are not aware of. This hinders animals from becoming autonomous and independent since when they are domesticated they no longer explore options that can promote their survival (Francione 1). Domesticating animals makes them unreal, and it exposes them to the world that is full of vulnerabilities. It prevents animals from becoming part of the real nonhuman beings. They are exposed to a lot of harms by the environment since they are not fully aware of their environment, and they cannot adopt important characteristics that can aid in their survival. In addition, when animals are domesticated, human beings only breed them so that they can acquire characteristics that are pleasing to human beings, but they are not favorable to the animals. While domestication may make animals comfortable, it hinders the expression of the natural relationship that should exist between animals and human beings (Francione 2).

In conclusion, natural selection is very imperative to animals. It is one of the key processes that have aided a lot in evolution. Through natural selection animals have been able to survive in conditions that are extremely harmful. The contribution of natural selection towards prevention of extinction of species by ensuring that animals that have the most successful traits can spread traits to future offsprings cannot be undermined.





















Works Cited

Francione, Gary L. “Animal Rights: The Abolitionist Approach.” 2012: 1-3.

Morgans, Courtney L. and Terry J. Ord. “Natural selection in novel environments: predation selects for background matching in the body colour of a land fish.” December 2013: 1241-1249.


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