Science

Chemistry is basic sciences course while biotech comes in life sciences difference in the two lies in specialisation also if you wish to teach at school level some day your biotech degree won't make you eligible for it but chemistry will. Otherwise both have good scope after msc in the subject as university teacher or in industries as associate of resarcher.

Hello,
Greetings from Shiksha!
Kindly check out the college predictor like Shiksha college predictor: https://www.shiksha.com/b-tech/resources/ts-eamcet-college-predictor
This will provide you the best information. Good luck!

Check out the official website of TS-EAMCET where you will find the best college that will suit you for going for CSE, ECE or EEE.

If admission date is over then you can't do much now for this college. Try other colleges where admission is still going on, it would be better not to waste one year for a specific college. It is the subject that matters more than a college if you are keen on studying microbiology.

Hi!
There is nothing called as the best field. It is your interest which leads you to take a field and excel in that. However, considering the options in India and the choice of students when asked to choose a field other than the above mentioned field are:
Medical
Arts (History, Political Science, Languages, etc.)
Commerce
Economics
Fashion Designing
Architecture
Management
Finance
Statistics and Actuarial Science
Irrespective of the opportunities in your field, what matters the most is your interest in the field. It is your interest that ignites you to work hard and achieve excellence in your field.

Hi Saheli, a professorship track abroad or in India could be the best , secured and highly paid. Take a Ph.D, complete your post doc and apply for professorship. Its going to be a long journey but worth it. And, if you want a non-Physcis job you will be eligible for a lot of options which could fetch you a good salary - banking, consultancy, design etc. Your career growth and prospects will purely depend on your interests and career goals.

NCERT are best for covering the whole on a basic level for more deeper and comprehensive study refer to together with. IGNOU books for B.Sc zoology can be refer to as they provide valuable concise notes.

Economics degree requires you to have maths in 12th. If you didn't had maths go for BBA which is your interest in business. Top colleges which conduct entrances for BBA are:
University of Delhi
Indian institute of management, Indore
St. Xavier's Kolkata
Christ University, Bangalore
Symbiosis University, Pune and Noida

Subjects such botany zoology, chemistry and physics makes you eligible for teaching at school and university level both while subjects such as biochemistry, biotechnology and biosciences makes you eligible for teaching at university level only and jobs in industries. Now choose where you wish to work.