The theory of natural selection occurs in 4 steps. Overproduction, Variation, Selection, and what else?

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

What are the base pairing rules? how does this allow for dna replication

Which of the following substances most likely dissolve in water? check all that apply •paraffin