B.Sc

Yes, you most definitely can. Admission into M.Sc zoology would also depend on how you perform in your undergraduate degree, as eligibility into universities may be based on your results in your UG program.

You can do PG in mass media or journalism.

Different universities have different cut-offs for admission in B.Sc (Military Science). DU cutoffs go as high as 99.25%, whereas other universities accept B.Sc aspirants with 70% marks. It is advisable that you check online for the cut-offs in different colleges/universities.

Can you clarify your query?

Cut-off ranks for B.Sc. in Agriculture (BCD Category) is around 7797 for candidates (Non-Farmer) in the general category and is the same for women. You can check for a detailed list of cutoffs from the link mentioned below:
http://management.ind.in/forum/eamcet-agriculture-cut-off-105369.html

You are advised to prepare for government exams or do some job oriented training program.

To get a good MBA college it's better to qualify GATE examination and qualify in that. This would help you to get the best college in India like IIMs and other government colleges. These colleges assure your placement in good MNCs and with good package.

B.Sc (General) has immense scope in the industry. Some of the industries where you could try pursuing a career are as follows:
1) Agriculture
2) Testing
3) Research Firms
4) Health Care
5) Education, etc.
Students also have the choice of pursuing higher studies which include courses like:
1) M.Sc. in Physics, Maths or Chemistry
2) MBA, specializations like International Business, HR, finance, etc.
3) Pharma industry
4) Astronomy

Yes, you are eligible for B.Sc in fire safety management course. We have already spoken about the course.