Science

Yes, you can but in B.Sc. you have to score 50% marks. Institute that provide these courses are Delhi Degree College, Vinayaka Institution Of Management & Technology, Indian Institute of Psychology, Amity Institute Of Psychology And Allied Sciences.

TNU ( THE NEOTIA UNIVERSITY) is good for B.Sc. agriculture
check this link for detailed info :- https://www.shiksha.com/science/course/b-sc-hons-in-agriculture-the-neotia-university-diamond-harbour-road-kolkata-297248

Yes, you are eligible for biotechnology course.

Khalsa college takes admission on the basis of cut off. You do not need baths to get admission here
https://www.shiksha.com/accounting-commerce/course/b-com-hons-sri-guru-tegh-bahadur-khalsa-college-north-campus-Delhi-53993.

When you apply to foreign universities the reputation of your college does matters a lot. Only cream students from cream college are able to make it.

It depends on college to college but an avg fee would be 1lakh pa + the hostel fee which varies hugely from 50k pa to even 1-2 Lacs. Check the exact amount on the website of college you seek admission into.

For which college are you asking for?

http://www.jaduniv.edu.in/
Hope it helps.

https://www.shiksha.com/engineering/food-technology-chp
refer this.

No, this is not compulsory as you are having the subjects of PCB, so having maths is not compulsion.