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:

2024-25: Microbiology B.A., College of Arts and Sciences Bulletin
2023-24: Microbiology B.A., College of Arts and Sciences Bulletin
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

Previous years' requirements