I took A&P 1 back in '91, so I had to retake it this past spring. Granted it was A&P, but how much can you remember in that amount of years w/o using it on a daily basis?
My point is, I wouldn't waste my time or money taking biology, but it really depends on what you feel you can do and how much time you can put into memorizing and learning. Utilize websites, resource rooms, tutoring, etc, make flashcards, CDs of you notes that you listen to all the time in the car, etc.
Do what you need to make the grade. (NursingJourney.com is my site, and I think the powerpoints will help you with the lab portion.)
Good luck in your decision, and your future career.