I'm taking a molecular biology course right now and it's fairly difficult. I'm worried that I might not do so well (B-C range, probably closer to C). However, if I drop it I will only be taking 3 classes (plus research credit). Do you think it is better to change it to P/F, just drop it, or stick with a possibly bad grade? How bad will taking molecular biology P/F look? By the way, if I take it P/F I will just have to end up taking another bio class for my major, so it's not such a big deal on my undergraduate requirement side of things.