Meselson and Stahl experimented with E. coli grown first in heavy nitrogen (15N) then in 14N. The fact that excluded the model of DNA replication (CHOOSE ALL THAT APPLY)
after one round of cell division in 14N, the DNA sedimented between the 15 and 14N levels; dispersive

after second round of cell division in 14N, some of the DNA sedimented between the 15 and 14N levels and some DNA contains 14N only; dispersive

after one round of cell division in 14N, the DNA sedimented between the 15 and 14N levels; conservative

after second round of cell division in 14N, some of the DNA sedimented between the 15 and 14N levels and some DNA contains 14N only; conservative
after one round of cell division in 14N, the DNA sedimented between the 15 and 14N levels; semi-conservative

after second round of cell division in 14N, some of the DNA sedimented between the 15 and 14 levels and some DNA contains 14N only; semi-conservative