Question

l like Biology,but I have to leave it and take math in its place to fulfill my aim in life.so what should I do in that situation.

Answer 1

it's so simple dear
Mind power will help you to achieve you what you want. Just believe on yourself and make up your mind to face this situation
otherwise, as you said that you are interested in biology then make your career in that field where you are interested I. e. biology....

Answer 2

There is less difference between the branches of science at highest level. Now, question is what you study first. If you are planning to study math now, you can, but at higher level you will prosper where your heart is. It is something, you have to develop some algorithm to study biological processes in body. The main and most important part is whatever you are studying, study hard, so that later on you can work on multidisciplinary field, where you can use both your passion as well as expertise. At highest lever, it does not matter what background you have, but you should have passion to learn, passion to perform and passion to success.