18. do antibiotics work on bacteria?

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic

New york city has 2,181 inhabitants per square mile. the state of alaska has 1.03 inhabitants per square mile. ecologists would say alaska has a low exponential growth population density birth rate carrying capacity