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| Speciation |
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| Is also referred as 'Origin of species'. |
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| All new species develop from pre existing ones. |
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| The formation of one or more new species from the pre existing species is called 'Speciation'. |
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| New species are developed mainly by isolation and variation. |
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| Isolation is the prevention of mating between breeding individuals of two different populations of the same species. |
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| Variations are the differences that appear in structure, physiology, cytology and behaviour of individual of a species. |
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| These are different ways by which isolation and variations results in the formation of a new species, such as chance migration and genetic drift, physical barriers, mutations, polyploidy, etc. |
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| Role of Long Distance Separation in Speciation |
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