3rd scores would probably be too late, but it is likely a good idea to take it again. Bio is a very important score.
I used Alan's Notes - wrote down everything word for word, then went through Destroyer's Biology section twice, and all of DAT Bootcamp's biology. If you do all that, you should have a pretty fair chance at doing well on it.
But yeah, getting their opinion first is good. If you want, I can shoot an email of the PDF for Alan's Notes to you. Let me know via PM if so.
Good luck!