Hello aspirant,
Admission to Msc. Zoology in Pune university gives 50% weightage to marks obtained in graduation and 50% weightage to marks in entrance exam. You can therefore not take admission without giving entrance. For detailed information on the admission procedure kindly check the official website:
http://www.unipune.ac.in/dept/science/zoology/zoology_webfiles/admissions.htm
Hope this helps. Good luck!