[Answer] Which of the following factors would not contribute to allopatric speciation?

Answer: Gene flow between the two populations is extensive

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Which of the following factors would not contribute to allopatric speciation? Allopatric speciation (from Ancient Greek ἄλλος allos meaning "other" and πατρίς patris "fatherland") also referred to as geographic speciation vicariant speciation or its earlier name the dumbbell model is a mode of speciation that occurs when biological populations become geographically isolated from each other to an extent that prevents or interferes with gene flow. Various geographic changes can arise such as the movement of continents and the formation of mountains islands bodies of water or glaciers. Human activity such as agriculture or developments can also change the distribution of species populations. These factors can substantially alter a region's geography resulting in the separation of a species population into isolated subpopulat… Various geographic changes can arise such as the movement of continents and the formation of mountains islands bodies of water or glaciers. Human activity such as agriculture or developments can also change the distribution of species populations. These factors can substantially alter a region's geography resulting in the separation of a species population into isolated subpopulations. The vicariant populations then undergo genetic changes as they become subjected to different selective pressures experience genetic drift and accumulate different mutations in the separated populations gene pools . The barriers prevent the exchange of genetic information between the two populations leading to reproductive isolation . If the two populations come into contact they will be unable to reproduce—effectively speciating. Other isolating factors such as population dispersal leading to emigration can cause speciation (for instance the dispersal and isolation of a species on an oceanic island) and is considered a special case of allopatric speciation called peripatric speciation . Allopatric speciation is typically subdivided into two major models: vicariance and peripatric. Both models differ from one another by virtue of their population sizes and geographic isolating mechanisms. The terms allopatry and vicariance are often used in biogeography to describe the relationship between organisms whose ranges do not significantly overlap but are imm...

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