I cannot comment on UW but is it a direct admit or Pre-Science?
UCSB admits into the Pre-Biology major.
Students interested in graduating with a major in any area of the biological sciences enter UCSB as a pre-biology major and take a subset of this key preparatory coursework in introductory biology, chemistry, mathematics, and physics. Once the pre-major requirements have been completed students may petition to declare one of the full majors. Note: Grades earned must meet the grade prerequisites for the full major.
For full instructions for declaring a major go to: Current Students.
Course Prerequisites
All Biology courses, with the exception of GE courses, build upon prerequisite or preparatory course work, and these prerequisites are strictly enforced by the departments. Students who have not successfully completed the prerequisites for a course will not be allowed to register. In addition, certain upper-division courses also have a grade requirement for their prerequisites, as discussed below. Specific course prerequisite information can be found on GOLD, in the UCSB Catalog, and on the annual departmental Proposed Course Lists.
Has she visited both campuses? What is her goal as a Biology major?
Grade Requirements for Prerequisite Courses
All upper-division MCDB courses and some upper-division EEMB courses require a “C” or better in their prerequisite courses. Students who pass a prerequisite course but with a grade lower than C must repeat the course and earn at least a C in order to advance to the next course.