What is the reason behind why enzymes are specific to a substrate? Why might this specificity be an advantage and disadvantage to the cell?

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

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air

The image below shows a weather service map. which details best describe this map? check all that apply