The formation of the Isthmus of Panama prevented gene flow between the Atlantic Ocean and Pacific Ocean populations of snapping shrimp. This reproductive isolation allowed the populations to diverge enough genetically that they were no longer capable of interbreeding. What is this process called?

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This process is called speciation, which occurs when a species evolves into two or more descendant species, often due to geographical isolation, such as the formation of the Isthmus of Panama in this case.

The Formation of the Isthmus of Panama Prevented Gene Flow