How is the Biological Sciences at UCI?

I have always been a big fan of biology, but I never had the chance to take AP Bio at my school. I’ve taken Honors Bio, Honors Chem, AP Chem, and Ap physics right now (not necessarily the greatest teachers, nor do they cover much for us, but i have a general foundation for each class). How is the BioSci at uci like? I’ve heard it’s more rigorous than UCSD due to taking so many bio and chem classes at once. Also, if I somehow find that BioSci isn’t right for me, can I change my major and by doing that wouldn’t mess up my graduation requirements?

I’m not sure if I want to go to Med School, but maybe I can travel through other paths that deals with biology/research.