Which best describes the process of editing a conclusion?

What claim did thorne make? what evidence supported his claim?

Why is excretion necessary to maintain homeostasis?

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