What are good extracurriculars for a biology major?
The strongest biology extracurriculars show progression: sustained service like hospital volunteering, a subject community like HOSA, hands-on lab research, a science fair project, and eventually something you found or lead. Admissions readers care less about the label of an activity and more about the depth and the results you can point to.
Do biology extracurriculars need to be medical?
No. Biology is broad, and ecology, genetics, marine science, conservation, and public health all make compelling stories. Pick the corner of biology you actually find interesting, then go deep. A genuine ecology project reads far better than a medical activity you joined only because it looked good.
How many extracurriculars do I need?
Quality beats quantity. A focused set of five to eight activities with real depth and a clear through line is stronger than a long list of one-meeting clubs. It is better to found or lead one thing than to passively join ten.