HELP (PLEASE!)! WRONG SAT II

<p>I took the SAT II in Bio (I like Bio better than Chem or Physics) and mistakenly assumed that CMU had the same requirements as MIT (and other places that take any science test and any math test).
I want to apply to Carnegie Institute of Technology for Mechanical Engineering as my 1st Choice and
to the Carnegie School of Science for Biological Sciences as my 2nd choice.
1) Would it be better to not apply to CIT at all because I didn't take the right SATII or should I just put Mechanical Engineering as my 2nd choice?
2) Should I apply to the school of Science Undecided because my Biology SAT II was only 700 so it doesn't seem as if I could handle the course-load (it's really because I crammed and took 3 SATIIs that day)
-Thanks for your help :)</p>