Biology is a popular major, meaning more competitive. You can look at the Profile of Admitted Transfer Students for UCLA to get an idea of major competitiveness by their admitted GPA. (See below.)
For biology at UCLA, the average GPA admit is 3.72.
While certainly the admitted GPA for UCSC will be substantially lower, you might want to look at UCLA majors that have lower GPA admits and consider applying to one of those, if you like it. The popularity of majors will stay fairly consistent across campuses.
You may or may not be able to switch majors after acceptance - usually a less competitive major is doable, and you will have better luck if requirements are completed, but I cannot guarantee what they will say. You may have trouble transferring to bio, but there may be other options. It is always wise to choose a major you can live with, in case it doesn’t pan out.
Students do get admitted with lower than average GPAs but you will have way more luck applying to less competitive majors, IMHO.
https://www.admissions.ucla.edu/prospect/adm_tr/Tr_Prof14_mjr.htm