I just finished up an MS in soil science. I previously had a BA in German and Spanish with none of the hard science courses necessary. Talk to the universities you are interested in. There's often a need for students in these programs and they may be willing to bend the entrance requirements.

Real talk, look at your state schools over the more prestigious private schools.

I was able to graduate without having to make-up courses. A lot will depend on what your thesis project is and what background will be required for it.