During meiosis 2 A. sister chromatids separate
B. homologous chromatids separate
C. homologous chromosomes separate
D. all of the above

Rotenone is an insecticide that is toxic

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen

Describe how a non-resistant staphylococcus aureus bacterium can produce a bacterium that is resistant to methicillin