Re: Will animals living in city areas evolve to adapt to their city environment

This is exactly how new species evolve:  when two populations are 
separated physically, once enough time passes, small differences will 
become big differences, and eventually the two will separate into two 
different species.  The formation of cities could be a factor to separate 
two different populations.  Remember though, that A LONG period of time 
needs to pass.  Cities have only been present in their present form for 
about 100-200 years; a typical city dweller, rats, have been around for 
millions of years.