What are the correct answers for number 3 and 5

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

Has regulatory areas for thirst, hunger, body temperature, water balance, and blood pressure

Iwanna go do something with my ideas? ?