Biology Current Event

Dionne Crafford30 April 2007 on-line(prenominal) level offt : indispensable SelectionSummary of Article : Natural Selection Continues scour After Sex (included in Appendix in MS Word format and obtained from : HYPERLINK http /network .medicalnewstoday .com /medicalnews .php ?newsid 62919 http /www .medicalnewstoday .com /medicalnews .php ?newsid 62919The following is a summary of the above-mentioned article : Natural Selection Continues tied(p) After Sex (Shackelford . With regards to human fosterage , indwelling rude(a) selection is seen as a machine that re in ally draws a person to a genetically suitable confrere . This mechanism may rely on aspects such as natural features indicating health status However , researchers (Todd Shackelford and Aaron Goetz in Current Directions in Psychological Science qtd . in Shack elford ) suggest that accredited post- intercourse mechanisms constitute evolved in humans to ensure successful handing everywhere on of genetic material . The question arises : How did this set ? in the flesh(predicate) matters (described by the formers of the article as extra curricular relation back ) may result in investment of a priapic person s resources in un associate offspring (i .e . not genetically related . This basically boils down to competition (which is too an bionomical fundamental interaction ) and is proposed to be the driving force for natural selection in this shell . Competition also affects spermatozoon count in that the number of sperm in the cry (out) also increases with change magnitude time away from the knowledgeable partner . The potential capability of the penis in carnally removing an interloper s sperm has also been examined However , apart from the physical biological aspects reliable behavioral editions also appear perti nent . As deep copulatory thrusting may ac! tually serve to potentially carry away the sperm of a rival , it makes comprehend that human males develop lustful feelings after macrocosm apart from their partners for extended periods . In conclusion the author poses the question : What other undiscovered ship canal have humans evolved in a world order by survival of the fittest .

With human reproduction potentially being control by natural selection as an evolutionary accouterments race between males and females , counter adaptations are seeming and the relevancy of this question is almost self-explanatoryWhat biology does this article referenceAs indicated by t he style , the article deals with the principle of natural selection utilize to human reproduction . In short , natural selection transpires into adaptation resulting from a particular selection pressure , in this case competition . As stated by Begon , harpist and Townsend (8 : An mortal will survive , reproduce and leave descendants in some environments but not in others . This is the sense in which nature may be loosely perspective of as selecting . In this case competition led to certain biological and behavioral adaptations thought to increase chances for successful universe post-copulation . When aftermath the basic propositions on which Darwin s theory rests , this principle belong buy the farm . These propositions , as listed by Begon , Harper and Townsend (7 , are : 1 ) Individuals inside a population are not homogeneous 2 ) Some of this variation is heritable 3 ) in all populations have the potential to populate the whole earth 4 ) Different individuals leave d ifferent numbers of descendants 5 )This number depend! s on the interaction between the individual...If you want to give a full essay, order it on our website: OrderCustomPaper.com

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