Uplift and formation of a mountain range divides a freshwater snail species into two isolated populations.Erosion eventually lowers the mountain range and brings the two populations together again,but when they mate,the resulting hybrids all produce sterile young.This scenario is an example of

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The scenario described is an example of allopatric speciation, which occurs when a physical barrier separates a population, preventing interbreeding and ultimately leading to the development of distinct species. The uplift and formation of a mountain range created such a barrier, separating the snail population into two isolated groups. When the mountain range eroded and the two groups were reunited, they were unable to interbreed and produce fertile offspring, indicating that they had evolved into distinct species during their time apart. This is a classic example of allopatric speciation.

Uplift and Formation of a Mountain Range Divides a Freshwater