Cynthia,
I'm not sure that specifically your science scores will impact you but your overall GPA will. If National University has a BSN program and you are currently enrolled, why not apply to that program? As an enrolled student, they have to consider you but if your transfer application is turned down, meet with your academic advisor and plead your case. The only way for you to address this is to get better grades. Consider tutoring.
Good luck,
R