Hi, BSc Biological Science is an undergraduate program in the field of Science the duration of which is 3 years.  The interested candidates need to qualify the 10+2 level from any recognized board of education with Physics, Chemistry and Biology as compulsory  subjects. Admission to the BSc Biological Science course is strictly done on the basis of the candidate’s marks obtained at the higher secondary level. However, some top colleges in India conducted their own entrance tests for getting admission to this course. After that, the qualifying candidates need to undergo a personal interview session for final selection. So, you will have to decide from where you wish to do your B.Sc. in biological sciences from and later on prepare for the exams if required. Hope this helps.