Hi,

If you are referring to admissions in BSc Biology in Mumbai. Then you can apply for different colleges through the official websites of respective colleges. The eligibilities vary from one college to other so you have to check the eligibility criteria before applying. However the minimum qualification for applying in BSc course is  a minimum aggregate of 45% in Class 12 with PCB (40% for reserved categories). To know the top BSc colleges in Mumbai please go through the following article

https://university.careers360.com/colleges/list-of-bsc-degree-colleges-in-mumbai

All the best.