I need help with this density question. Answer should be explained.

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .

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

Which of the following best describes the relationship between glucose and complex molecules such as hormones?