Speciation occurs when organisms diverge after experiencing different sets of environmental pressures. Organisms belong to different species when they can no longer interbreed to produce viable offspring. More »

Sympatric speciation is an evolutionary process that occurs when brand new species evolve from one common ancestral species. The newly evolved species occupies the same geographical location that the common ancestor inha... More »

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Allopatric speciation is the division of species by geographical means. In the process of allopatric speciation, an extrinsic factor, or factors, prevents two or more groups of organisms from interacting or mating with e... More »

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Peripatric speciation is a special case of allopatric speciation in which a comparatively small group of organisms becomes isolated, usually geographically, from the main population. An example of a condition that encour... More »

Sympatric speciation occurs when populations of the same species become reproductively isolated from each other due to breeding preferences. This most often occurs in plants that exhibit polyploidy, a disorder in which c... More »

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An example of sympatric speciation can be seen in the change in the egg-laying habits of the apple maggot, first observed in the early 19th century. The sympatric speciation of the apple maggot fly occurred as a result o... More »

The biggest factor speeding up speciation is geographic isolation of populations. When a single species is divided into two or more groups so that the members of one group cannot breed with another, this allows each grou... More »