What math did you complete in high school?
http://www.math.buffalo.edu/rur_index.html is a collection of on-line quizzes that let you check your readiness on each prerequisite subtopic. For example, the “are you ready for calculus 1?” quiz has 11 subtopics of precalculus material to check your knowledge on. You may find that you only need to review a few subtopics to be fully ready for calculus 1, for example.
In many colleges, calculus and statistics are required for biology majors. If you are pre-med, these are expected by many medical schools.