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Essay

Natural Selection

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Issue:

Social Issues

 

Written by:

Anthony K

 

Date added:

October 7, 2014

 

Level:

University

 

Grade:

C

 

No of pages / words:

3 / 751

 

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6632 times

 

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Essay content:

The theory of natural selection was proposed by Charles Darwin and Alfred Russel Wallace in 1858, though vaguer and more obscure formulations had been arrived at by earlier workers. Natural selection can be subdivided into two types: (i) ecological selection, which arises from the portion of an organism's environment not related to direct sexual competition (such as the availability of food, the presence of predators, and so forth); and (ii) sexual selection, which arises from the competition for mates between individuals of the same sex...
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The reason for this division is that the effects of sexual selection can produce results that seem counterintuitive from the point of view of ecological selection alone (a famous example being the tails of peacocks, which, though cumbersome, serve an important purpose in courtship displays.) Natural selection is distinguished from artificial selection, which is the alteration of domesticated species resulting from human intervention as opposed the "natural environment"...
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