You may earn up to Rs 2 50 000 per month or become jobless. It depends upon your skill and ability to perform in the industry. The paymaster will pay you by seeing your performance that will help his/her organization to make profit and not your degree or stream.
Now tell me what about your Biology. Is it that you have heard that Biologists are not capable of earning higher amount? If so, then it is wrong. There are numerous areas a Biologist can work and all are lucrative. Do not change your liked area, you will end up in low output. Stick to your own domain, love to learn the subject, build up strong knowledge foundation and walk in for the interviews. Where? Hmmm, try for, say, National Geographic. Won’t you like it? I hope yes.