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The processes of evolution - Essay Example

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Defining a species also defines what speciation is. Species is one of the most often used biological units; in agricultural and in medicine species must be…
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The processes of evolution
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Download file to see previous pages terbreeding natural populations, which are reproductively isolated from other groups, (Hausdorf, 2011).’In essence a species is considered the biggest gene pool that can occur under natural conditions.
Populations connected by gene flow are often hard to classify. While a species concept defines the conditions under which a population should be classified as a species a population are individuals that belong to a specific species and are usually located in an area that is able to be defined. Populations interact with other populations in their environments and their physical environment; also interacting with those populations of another species. Populations that grow exponentially can reach the maximum sustainable of their population in a certain environment.
There are four different forces of evolution; natural selection, mutation, gene flow, and genetic drift. Natural selection has four different components which struggle with each other to change certain traits within populations (University of Michigan, 2010). Natural selection is subject to inheritance, whereas traits are passed on through heredity, variation such as hair color and eye color or other individual characteristics. An increased rate of population growth means that each population is subject to struggle for a dwindling supply of resources. Finally differential survival and reproduction means that those individual’s more suited to the struggles will pass on more offspring and genes which are able to withstand different conditions. Natural selection depends on traits that are inheritable.
Mutation causes new genetic variations in a certain gene pool. These mutations cause the variation in genetics that allow others evolutionary forces to act such as natural selection, gene flow and genetic drift. Gene flow occurs when individual’s move into and out of certain populations. An example of this would be Americans resettling in other Countries and producing offspring. This affects that ...Download file to see next pagesRead More
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