On the one hand biology is a great major for pre-med as one tends to satisfy major reqs and most premed reqs at same time. It also helps that it’s your favorite subject as if you’re interested in material you’ll tend to better GPA wise which is something med schools care a great deal about in part. On the other hand as most premed hopefuls change their minds for any number of reasons, and of those who actually apply, 60% will not get even one med school acceptance, you need to think about what you plan to do with your bio degree if career plans change. (eg graduate school).