Thoeries Of Evolution Essay -- essays research papers fc

Thoeries of EvolutionEvolution is the process by which living organisms originated on earthand chip in changed their forms to adapt to the changing environment. The earliestknown fogy organisms argon the single-celled forms resembling modern bacteriathey date from about 3.4 trillion years ago. Evolution has resulted insuccessive radiations of new types of organisms, many of which have becomeextinct, but some of which have developed into the present zoological science and flora ofthe world (Wilson 17).Evolution has been studied for nearly two centuries. wholeness of theearliest evolutionists was Jean Baptiste de Lamarck, who argued that thepatterns of resemblance found in various creatures arose with evolutionarymodifications of a common lineage. Naturalists had already established thatdifferent animals argon adapted to different modes of life and environmentalconditions Lamarck believed that environmental changes evoked in individualanimals direct adaptive responses that could b e passed on to their offspring asinheritable traits. This generalized hypothesis of evolution by acquiredcharacteristics was not time-tested scientifically during Lamarcks lifetime.A successful explanation of evolutionary processes was proposed byCharles Darwin. His more or less famous book, On the Origin of Species by Means ofNatural natural selection (1859), is a landmark in human understanding of nature.Pointing to variability inwardly species, Darwin observed that while offspringinherit a resemblance to their p arnts, they are not identical to them. Hefurther noted that some of the differences amid offspring and parents werenot due soley to the environment but were themselves often inheritable. fleshlybreeders were often able to change the characteristics of domestic animals byselecting for reproduction those individuals with the close to desirable qualities.Darwin reasoned that, in nature, individuals with qualities that made thembetter adjusted to their environments or gave them higher reproductivecapacities would tend to leave more offspring much(prenominal) individuals were said tohave higher fitness. Beca economic consumption more individuals are born than stand firm to breed,constant winnowing of the less fit-a natural selection-should occur, leading toa cosmos that is well adapted to the environment it inhabits. Whenenvironmental conditions change, po... ...le in the shortterminus have broad tolerances, which may better enable them to survive drawn-outchanges. Human beings are uniquely adapted in that they make and use tools anddevices and invent and propogate procedures that give them extended control overtheir environments. Humans are significantly changing the environment itself.The effects are most convoluted and cannot be predicted, and yet like thelikelihood is that evolutionary patterns in the afterlife will reflect theinfluence of the human species(Microsoft96).Works CitedArdrey, Robert. The huntinging hypothesis A Personal C onclusionConcerning the Evolutionary Nature of Man. New YorkAntheneum, 1976.Encarta 96. calculating machine Software. Microsoft, 1995.Gribbon, John and Cherfas, Jeremy. The Monkey Puzzle Reshaping theEvolutionary Tree. Philly Pantheon, 1982.Reader, John. Missing links The Hunt for Earliest Man. Boston Little,1981Schwartz, Jeffery H. The Red Ape Orang-Utans and Human Origins.San Francisco Houghton, 1987.Wilson, Peter J. The tameness of the Human Species. OxfordYale, 1991.