Approximately 3.5 million years ago the Isthmus of Panama formed. This new landmass severed the connection between the Pacific Ocean and the Caribbean Sea. An ancestral fish population (porkfish) was split in two by this event; the two populations no longer interbreed and are two distinct species. This type of speciation is called
A. allopatric speciation.
B. parapatric speciation.
C. hybridization.
D. sympatric speciation.
E. sexual selection due to ecological variation.
A. allopatric speciation.
Biology & Microbiology
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Biology & Microbiology