Zoology

I'm gonna answer the part about IISER. After completing your B.Sc, you could pursue an integrated M.Sc-PhD at any IISER (though the amount of people selected is pretty low compared to BS-MS dual degree). You could also try out Ph.D. after you get your Masters. Then you would have to sit through an exam and interview.

Hi,
As you are a PCB student and you have scored 70% which indeed is a good aggregate. Now, you just fill the form for further studies from any online kiosk and choose any five good colleges from lots of entries and then you go to the college for self-verification at the very centre allotted for the verification.
Following are the good colleges:
1) IEHE
2)Sarojini Nadu girls PG college
3) Maharani Laxmibai Girls PG College
These 3 are excellent government colleges.

There are a total of 92 seats for zoology in Delhi University out of which 46 are for general candidates.

Yes, you can apply. Forms are out at official site of PU today.

Please refer to the link provided below for eligibility criteria to pursue M.Sc in Petroleum Geology from The Maharaja Sayajirao University of Baroda.
https://www.shiksha.com/science/course/m-sc-in-petroleum-geology-the-maharaja-sayajirao-university-of-baroda-vadodara-179243

Hello Joggari,
You can get all the information by visiting this site-
https://www.shiksha.com/university/sri-venkateswara-university/exams/svucet?q=SVUCET&rf=searchwidget&landing=ep
Hope this was helpful. Thank you and Best of luck.

Yes, all biology, physics & chemistry portion of 11th & 12th CBSE board. You can expect many knowledge-based MCQ questions as well.

Yes, you can get into DU for your preferred course through entrance exam. I am not familiar with the cutoffs for entrance exam. So, I would recommend you to check the official website of Delhi University and the view it yourself according to your convenience. The link for the official website of DU : http://www.du.ac.in/du/.