Science

You may get IHM-Lucknow or AIHM-Chandigarh. IHM-Jaipur is also possible.

Very low chances, keep checking other options.

Yes, there is fee concession for category students but this is followed in only government colleges. You will not get any concession in private colleges.
Good luck.

To become a geologist, the students must have completed their 10+2 examination from any stream & do a Bachelor's degree from any university. After passing the Bachelor's degree, students can pursue the Master's degree. If you want to go for higher education, then you can go for a doctoral degree course.
Good luck.

After B.Sc, you can go for M.Sc in the same field. Then, you can do Ph.D. in the any of a field. This is the highest degree you can earn. You can also do job in any company after B.Sc. Or M.Sc.
All the best.

After completion of B.Sc, either you should choose M.Sc or MBA. If you want to be in Science field, then go for M.Sc or if you are interested in business and marketing field, then go for MBA. After M.Sc, you can pursue Ph.D in any subject. All the best.

No fixed percentage are required. You can Maths with any of percentage. But, if you go in engineering field, you need at least 55% marks, but these would not be enough to sit in an interview for some of best company. So, do score at least 60% marks in class 10th and class 12th as well. All the best.

No, for doing M.Sc in statistics, you must have completed B.Sc in Maths or statistics. You can't pursue Masters in Science with a graduation degree of commerce.

Yes, you can get hostel easily as per your rank. You will have to pay total of INR 18,000 per year as fees.
Good luck.

Hi, you can visit the link for the best biotechnology colleges in Pune:
https://www.shiksha.com/science/colleges/biotechnology-colleges-Pune
Regards.