Which elements account for more than 97% of the weight of most organisms?
C, H, N, Mg, O, S
B, C, H, C, O, P, S
C, H, N
Fe, C, H, O, P
Ca2+, K+, Na+, Mg 2+, Cl-
{"name":"Which elements account for more than 97% of the weight of most organisms?", "url":"https://www.quiz-maker.com/QPREVIEW","txt":"Which elements account for more than 97% of the weight of most organisms?","img":"https://www.quiz-maker.com/3012/images/ogquiz.png"}
