Completion of first year requirements, including Biology 1222 or 1223 with a mark of at least 60% in this principal course.

Chemistry 1050, or the former Chemistry 1020 or 023;
Physics 1028A/B (or Physics 1020 or 1024, or the former Physics 022 or 025);
1.0 course from: Applied Mathematics 1201A/B or the former Calculus 1201A/B, Applied Mathematics 1413,  Calculus 1000A/B, 1100A/B, 1301A/B, 1501A/B, Linear Algebra 1600A/B, Mathematics 1225A/B, 1228A/B, 1229A/B, or the former Mathematics 030, Statistical Sciences 1024A/B.  If not completed in first year, the Mathematics requirement must be completed by the end of second year.  Highly recommended: Earth Sciences 1088F/G, Environmental Science 1021F/G.

2.0 courses: Biology 2483A, 2484A, 4230A/B, 4405F/G.
0.5 course from: Biology 2485B, Medical Biophysics 3336F/G.
0.5 course from: Biology 2244A/B, Statistical Sciences 2122A/B (students may substitute Statistical Sciences 2035 or Psychology 2810 for this 0.5 course and this would make the module 6.5 courses).
3.0 courses from the following: At least 1.0 course from: the former Chemical and Biochemical Engineering 3363A/B, Chemistry 2210A/B, Civil and Environmental Engineering 4405A/B, Environmental Science 3300F/G, 3350F/G; and at least 0.5 course from: Geography 2430A/B, 3431A/B, Sociology 2246A/B; At least 1.0 course from: Epidemiology and Biostatistics 3330B, Microbiology and Immunology 2500B, Pathology 3240A, 4400A/B, Pharmacology 3560A/B, 4660A/B.

Note: At least 3.5 courses taken in the module must be from the Faculty of Science.