Please answer some of my previous questions pleasee

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

How does friction with the atmosphere affect the speed of an artificial satellite

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