More species tend to be found in regions subdivided by rivers,canyons,mountains,or other human-induced barriers because of

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Regions that are subdivided by barriers such as rivers, canyons, and mountains create geographic isolation, which leads to the evolution of distinct species in each isolated area due to lack of gene flow between populations. This process is known as allopatric speciation. Therefore, more species tend to be found in regions with geographic isolation.

More Species Tend to Be Found in Regions Subdivided by Rivers,canyons,mountains,or