I started taking my prereq.s this semester. I have an associates degree, and about a 3.6 average in all my other courses. This semester I am taking Bio. 101, and 102. I am struggling in these courses, and it looks like the best I am going to do in these courses is either C's or maybe B's. Should I withdraw from these and just take them next semester, or just take the grades and move on? I am taking these courses while working full time +. Will C's or B's kill your chances since these are the science requirements?