Saturday, December 21, 2019

The Origin Of Diversity Within Species - 1361 Words

According to Charles Darwin, he suggested that all organisms were descendants from a common ancestor that was once existed in the past (Darwin 1859). As organisms share a lot of common characteristics due to common ancestry, the history of evolution of different species can be known through comparing how closely their genes and body structures were. The more similar those characteristics are, the more closely related those species is. However there is a wide range of diversity between every single species and between every single individual. Diversification allows organisms to occupy different niches in the ecosystem. In this essay, the origin of diversity within species, the origin of diversity between the species, the significance of†¦show more content†¦Every single individual will not be genetically identical unless they are identical twins. Variation within individuals could be caused my crossing over or independent assortment during the process of fusion of two gametes . !!!! Origin of diversity between species A common ancestor gave rise to all organisms on earth. However, every individual species developed their own distinct character that allows them to play a specific role in the ecosystem. Diversity is caused as species are being isolated by geographic barriers or by sexual selection. The diversity between species can be present as there is a difference in the species heritable trait. Those organisms that contain an advantageous allele that allows them to be better adapted to the environment survive and reproduce. As a result, the advantageous allele will be inherited by the offspring and the frequency of the advantageous allele will increase within the population. In the example of Strepsirhini, it was one of the linages that was evolved form the earliest primates together with tarsiers (e.g. monkeys and apes) (Hickman, et al. 2011). When Madagascar was separated from the southeast coast of Africa at about 120million years ago, the Madagasy prosimians where separated from the rest of the population of apes and monkeys. The Madagasy prosimians where geographically isolated form the rest of the primate populationShow MoreRelatedDiscuss the origin and significance of diversity within and between species in a named taxonomic group of your choice(Ants).1888 Words   |  8 Pages150 million years ago(2006 Chuck Lydeard)1. Due to their long ecological dominancy amongst insect and short life span they have undergone a high rate of adaptive radiation. Leading to a reasonably large amount of species and inter- species diversity. There are at least 12000 different species of Formicidae (2008 Edward O. Wilson)2 which have colonised almost every landmass on the planet(Alice S. Jones 2006)3 This unique dominancy and prevalence means that Ants presently account for an incomparable 15Read MoreThe Origin And Significance Of Diversity Within A Named Taxonomic Group Of Your Choice1264 Words   |  6 Pagesthe origin and significance of diversity within and between species in a named taxonomic group of your choice.† The stability of biodiversity over millions of years of evolution has been one of the most persistent puzzles of ecology and evolution (Hutchinson, 1961). Different species had evolved from their ancestral and were not created in their present forms (Darwin, 1859). This essay will explore how diversity arises within andRead MoreCreationism And Evolutionism - Explaining Life1344 Words   |  6 PagesCreationism and Evolutionism – Explaining Life Imagining the whole world, it seems to be a sheet made of small pieces of different tissues. The countless diversity of species existing in the world makes everyone think about how all species appeared. 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