The Origin of Species

Species argon a group of animals or plants which ar kindred and can breed together to produce young animals or plants of the same kind as them. Speciation, the origin of upstart species, is the tell process that brings juvenile types. The four factors that contribute to the creation of new species within a people are geographical barriers, bionomic isolation, behavioral isolation and polyploidy.

        There are two types of geographical barriers, prezygotic and postzygotic barriers. Prezygotic barriers are barriers that hinder the mating of two members of different species and are isolating mechanisms that occur prior to a zygote cosmos formed. Prezygotic barriers include temporal isolation, habitat isolation, behavioral isolation, mechanical isolation, and gametic isolation. Postzygotic barriers are barriers that fail the reproduction even though fertilization takes specify and are isolating mechanisms that occur after fertilization. Postzygotic barriers include loan-blend viability, hybrid fertility, and hybrid breakdown. The main role for these geographical isolations is to enlighten speciation. There are also three other earthshaking geographical barriers, genetic disgorge, blockade marrow, and founder effect. Genetic drift is a change in a states allele frequencies due to chance.



The bottleneck effect is where natural disasters such as earthquakes and floods reduce the sizing of the population drastically, resulting in a small surviving population that is not representative of the original populations gene pool. The founder effect is where a genetic drift occurs in a new colony by few organisms from a larger population colonizing an isolated island, lake, or some other new habitat.

         bionomical or habitat isolation is a significant prezygotic barrier. ecologic isolation occurs when two species living in the same orbital cavity but in different habitats do not group meeting due to having different feeding, nesting, and mating locations. For example, two species of frogs live in the same area, but wood frogs breed...

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