What reasons do scientists give for saying that ciruses are not living organisms?

a. they cant reproduce without the aid of a host

b. they do not metabolize food in energy

c. they do not organize cells

d. all choices are correct

e. none of the choices are correct

true                                                                                                       true true true true true true

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%