In my fall semester as a freshman (first semester) I got an NC in bio 1. I'm a sophomore now and I'm taking Bio 2 and Chem 2. I did bad on both of the first exams. Should I withdraw from bio 1 , chem 1, or both? How bad would an NC and Two W's look on a transcript for schools like NYU Columbia and Stony? By the way on my first exam for bio I got a 46 and for my chem exam I got a 30.