There are many biological fields:
environmental bio is very big right now.
if you continue your studies, there are many research fields:
pharmaceuticals, bio-engineering, genetics, etc.
"Simple" nurse? LOL - you can go on to become a nurse anesthetist and make lots of money, or a physicians asst. or midwife, or
go into Med Tech, Radiology, etc.
Bio is wide open for lots of possibilities!