Question

A particular species of fish were split by the formation of the isthmus of panama a long time ago . the fish developed changes in their genes to adapt to the new environment and became two different species. what is this process called ?

Answer 1

allopatric speciation.

Step-by-step explanation:

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Answer 2

The process in which a particular species of fish were split by the formation of the isthmus of panama a long time ago is called allopatric speciation.
During this process changes in the genes of particular species are developed in order to adapt to a new environment.This type of speciation results in the formation of separate species as a result of geographic isolation.