I would say it depends on how strong a student you are (self motivation, etc), because Orgo is no cake walk and Physics II is also challenging. Whenever there is an online class, and I have taken a few online bio classes, I never remember anything I learn from the online class - like maybe 10% of the material. For me, there is something about engaging with others in my class and the teacher, just hearing it form a live person and talking about it really solidifies the information. If you're taking the class to just get an A, online might be fine, if you really want to understand on a deep level the complex relationships (for the MCAT etc), then I would suggest taking it in person, if your schedule permits. Better to get an A in orgo and physics over 2 sems than 2 Bs in one sem, imo.