Use the IU College of Arts and Sciences Bulletin appropriate for your year of matriculation to find requirements for a B.A. degree in Microbiology:

2022-23: Microbiology B.A., College of Arts and Sciences Bulletin
2021-22: Microbiology B.A., College of Arts and Sciences Bulletin
2020-21: Microbiology B.A., College of Arts and Sciences Bulletin
2019-20: Microbiology B.A., College of Arts and Sciences Bulletin
2018-19: Microbiology B.A., College of Arts and Sciences Bulletin
Previous years requirements