hi,

see admission process is different for different colleges, some of the college takes admission based on graduation marks , some of the university has entrance test like delhi university, banaras hindu university, colleges under calcutta university is based on graduation score basis, you need to check the college official website and apply for the courses, follow the below link to know about colleges offer msc in zoology,

https://university.careers360.com/colleges/list-of-msc-in-zoology-universities-in-india