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Dictionary » E » Evolution EvolutionDefinition noun, plural: evolutions (1) The change in genetic composition of a population over successive generations, which may be caused by natural selection, inbreeding, hybridization, or mutation. (2) The sequence of events depicting the evolutionary development of a species or of a group of related organisms; phylogeny.
In order for evolution to occur, there must be genetic variation. Genetic variation brings about evolution. Without it there will be no evolution. There are two major mechanisms that drive evolution. First is natural selection. Individuals with advantageous traits are more likely to reproduce successfully, passing these traits to the next generation. This kind of evolution driven by natural selection is called adaptive evolution. Another mechanism involves genetic drift, which produces random changes in the frequency of traits in a population. Evolution that arises from genetic drift is called neutral evolution.
See also: Darwinism. Related terms: ![]()
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Results from our forumneed helpI will do the evolution of MetaGenomics. Is there anyone making researching on microbe's evolution.And is there any papers can be used to help me come to understand it rapidly.Thanks.
See entire post how anoxybiont choose the pathway... products from the pyruvate, one is alcohol like the yeast, and the other one is lactic acid like the lactobacillus. My question is that what‘s the evolution of choosing these two pathways to generate energy. What is the factor for its choosing the alcohol pathway or the lactic acid pathway? I have ...
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Re: Question About Common Descent... inform me about the status of common descent at the molecular level? In particular I would like to know if, from the study of biochemistry and evolution, it has been established that the various primative molecular life forms developed from a single sequence of chemical activities at one particular ...
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Question About Common Descent... inform me about the status of common descent at the molecular level? In particular I would like to know if, from the study of biochemistry and evolution, it has been established that the various primative molecular life forms developed from a single sequence of chemical activities at one particular ...
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living forever... the vast majority live just a couple of months, or couple of years if they are lucky. In my opinion, this suggests that there is a strong evolutionary reason behind death of old age. Thus it seems that you or I not living forever is good for our species, even if we did not like it. The ...
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