A degree indicates you can or at least could learn. Learning to be a soldier or officer is a little different than sitting in classes, writing a few essays and passing a few exams, oh yes we do that, too. But you actually have to prove you can contribute in a team conceptual world 24/7, when you are told to not necessarily just when you want to.
Just because you have a piece of paper that says you met the minimum standard of your university's physics program doesn't give you a big jump on the next guy in line at the recruiting centre. The aptitude test will sort that out.
Now go forth seek your answers using your university-proven research skills, try searching the recruiting threads and CF recruiting site previously provided.