Science

First, you can improve your language. You can learn to speak fluently, in good language. You can learn English, even it is not necessary. You practice speaking loudly, so as to reach the entire class. Be punctual to the class and don't waste your time on unnecessary issues. Study your subject thoroughly and go to class, fully prepared. Dress well and maintain neatness. Clean your shoes, before going to class, as students watch everything.

One can pursue B.Sc on the basis of marks obtained in class 12th as in the case of DU and other prestigious Universities. Many universities take direct admission for B.Sc courses.

Insurance industry developed for shipping industries 12 century back in London. It is Mecca of Insurance & Actuarial Science. Therefore, UK is the ideal place to study Actuarial Science.

Manipal Institute of Technology under Manipal University offers M.Tech in Environmental Engineering and Construction Engineering & Management for Civil engineering graduates. You may refer to following link for further details: http://manipal.edu/mit/programs/program-list/mtech.html

Agriculture is a Professional qualification and the better of the two.

Please mention your stream and the subject that you are more interested for teaching.

Nutition and dietetics course requires at least PCB at 10+2 level as minimum eligibility. It is very demanding course with great job opportunities.

You may become a professor of biology if you scored well. You may also get selection for Universities so that you teach the higher level students. Pharmacy is another option for you.
All the best.