How does photosynthesis affect multiple levels of life?

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

In the first stage of the nuclear fuel cycle the spent fuel must be transported, processed, and disposed of properly. true or false

What is the number of cells produced in mitosis