though there is a high degree of uniformity among the various health professions, some variation in these requirements does occur. Science requirements should be completed (excluding English and Mathematics) by the end of junior year or at the very latest by the beginning of senior year, unless you intend to delay admission to professional school.
Online courses: Some professional schools do not accept online science courses, especially those with online labs. It is the student's responsibility to check the requirements for each school to which they are applying.