I currently have a commitee letter as well as letters of rec from 1 science Prof, my PI (whos also taught me for a class as well), and a physician. I just realized that a few schools I applied to have weird requirements (drexel, Penn state, Indiana) from non science professor. Will my application not be marked complete if I don't find one ASAP? I haven't taken any non-science classes since freshman year and the one I took this semester I barely got to know the professor cause COVID, but I got an A. Should I ask them for one.