More info about population: http://www.ento.vt.edu/~sharov/popechome

A text summary of the clickable map above, meant for web-crawlers and other automatic tools:
population level of biological organization
population site of evolution
population site of adaptation
population has characteristic gene pool
population has characteristic genetic variation
population contains living thing
population always at risk of extinction
population has definition group of interbreeding organism
population contained in ecosystem
population contained in species