Hey Anki,

IF YOU WANT TO DO M.Sc Zoology- 

*You can work as a professor at a college after qualifying NET/SET examination.

*You can further pursue research (PhD) abroad or in India.

* You can do jobs in pharmaceutical companies who offer jobs to M.Sc degree holders.

*You can work for Zoological Survey of India after Masters.

*You can do indivisual business like pisciculture, sericulture etc 

IF YOU DON'T WANT TO DO M.Sc Zoology-

* you can give railway and Bank PO exams after graduation.

*You can prepare for Civil Services.

* You can opt for pursing MBA after qualifying exams like CAT, MAT etc.

*You can do B.Ed for 2 years and enter into teaching profession.

Zoology is a vast field. The jobs are not tempting after B.Sc but there is a range of opportunities after masters. You can always prepare and apply for jobs that interests you.

Hope it helps, good luck!