I always joked about how us Bio majors had the worst of it.
We had to take both kinds of Chemistry because you can’t understand Bio without Chem. But of course you can’t understand Chem without Physics so you have to take that,
We had to get multiple semesters of Physics and Chem with labs “out of the way” before we could even start on a bio major.
Bio is definitely a heavy subject, hence my laugh at the expense of undergrads who took it for their one mandatory science. Most of them take it for the relative lack of math compared to chem or, especially, physics.