Hi,
I need to know what are the career options after doing plain bsc(chemistry, zoology, botany) other than becoming a teacher.

Wht are career options after doing plain bsc

You could expand in biochemistry and become a biochemist (and not be a teacher).

With botany, you could expand into research - look at what Gregor Mendel accomplished with his studies.

With zoology, could you get into wildlife management, being a director of a zoo, or into animal research, or work for an entity that works with endangered wildlife?

Start googling your basics that you listed. Do you have access to a vocation counselor? That would be a good resource of information.

Good luck to you.