You Learn That Two Species of Fish Co-Occurring in a Lake

question 32

Multiple Choice

You learn that two species of fish co-occurring in a lake evolved into different species because of divergent specialization on bottom- or open water - feeding behaviors.This is a remarkable example of what type of speciation?

• A) Rapid environmental speciation, because the environment drove the speciation event
• B) Sympatric speciation because the two fish lived in sympatry during the process of speciation
• C) Speciation dominated by a chance event, where the chromosome number randomly doubled
• D) Allopatric speciation, because the two fish were separated by the water.