Science

Dear Arun!
After passing graduation in physics, you will get the option like;
#1) AstroPhysics
#2) Statistics (most preferred)
#3) Pharmacy
etc. It's actually depends upon your preference the what you are willing to be the future.
Good Luck.

Yes, you have two options on the basis of two different subjects that is physics and biology. Firstly. if you really like biology then you may proceed with the medical entrance exam and furthermore, you can do B.Sc in physics to become a well-known physics professor. In spite of all these, you have a good chance of doing physiotherapy as you like both biology and physics. And physiotherapy also needs these two subjects strong. My opinion for you is physiotherapy as this is one of the most developing courses today in the entire world.

Dear Pooja!
Absolutely yes!
For getting admission in MSc Environmental Science, you need to score more than 50% in your graduation. However, if you are SC/ST you need 45% aggregate in graduation. But your subjects in graduation should consists the subjects like Physics, Chemistry, Biology, Environmental etc.
So, yes, you are eligible.
Good Luck.

As a career counsellor, I would suggest you go for MBA in IT or HR. It will surely help you get a good job.

You need to discontinue B.Sc if you want to pursue B.Tech in IT. You will have to take admission in the 1st year of B.Sc in IT.

Yes, of course.
The major advantage of doing B.Sc in this subject is that the course duration is short as compared to B.Tech or BE.
This is a rapidly developing field. Many private businesses are exploring this field and heavily investing in it. It is safe to say that there are ample job opportunities for biotechnology graduates in the private sector. Government sector too offers job opportunities, but not in the scale in which private sector does.
Some prominent industries where biotechnology professionals may find jobs are Pharmaceuticals Industry, Healthcare sector, Chemical Industry and Research sector.
Thanks.

You will have to appear for IIT JAM. It is the entrance test for IISc, Bangalore.

No, you have to appear for CAT that is a basic requirement and all the other processes after that.