Think about the possible effects of exotic species. The Norway rat and the black rat were both introduced to this country from Europe. The Norway rat is found only in cities and inhabits most cities in the U. S. The black rat can live in cities and rural areas but in New Jersey is only found in rural areas. Some cities in New Jersey which previously had only black rats, now have only Norway rats. This is an example of: Group of answer choices competitive exclusion evolution by natural selection genetic swamping density-dependent population regulation commensalism