Dear aspirant,

University of Delhi offers BSc Honors in Zoology at various colleges affiliated to it. Admission to this course requires a high percentage in your best of three subjects in your class 12. The university then releases cutoffs on the basis of which you can apply to the college available.
If you would like further information regarding the admission procedure at University of Delhi, I request you to visit the link provided below:

https://university.careers360.com/articles/du-admission

To check the cutoff lists for previous years, visit the link provided below:

DU Cut Off 2021, 2020, 2019: Arts, Commerce, Science Cutoff List PDF (careers360.com)
Hoping that you have already filled the application form during the notified duration, all candidates are requested to regularly visit the official website of the university to keep themselves updated with the latest information regarding the admissions. Visit the link provided below to get latest information:

DU- Admission (uod.ac.in) (https://admission.uod.ac.in/)

Hope this helps!