Question regarding taking more upper div science courses - might be a basic question. Upper div constitutes anything above 300 level correct? What if I wanted to take booster classes such as pathophysiology, pharmacology, immunology, etc, which aren't necessarily pre-reqs... however I'm trying to search around for a good online class to take them (since my school doesn't offer these courses), but they all seem to be 200 level. Will it be better to take the courses anyway as a science GPA booster? Or will it just be a waste of effort since they are lower division?