Botany

Yes, you are eligible.
Hope this helps you.

You can apply for M.Sc. In biotechnology in which mathematics is not cumpulsary.

Kindly refer http://www.sjc.ac.in/guidelines_pg.html

You need to have a Bachelors degree in respective subjects like Botany, Genetics, Biochemistry, Microbiology, Genetics, Biotechnology, Life Sciences, Molecular Biology and Biomedical Sciences in Science stream. So, yes, you are eligible to apply.

If you are doing studies in botany then why are you going for B.Ed, which is not having much scope in future? Why don't you go for some extra degree which leads to better placement at some institution?

You can get them here http://www.uniraj.ac.in/examination/uratpg2014/modelpaper.php.

Yes, but both entrance test will be held on the same day, one is at 12:00 noon and other one is at 3:00 pm on 28/05/2019.

I am not sure about it as I am from a different stream but to help you out I am giving you the phone number of food science department below:
Prof. Sheel Sharma(Food Science & Nutrition) Phone: 01438-228341, Extn. 336.
You can contact her any time between 9AM - 4PM, except Tuesday.
Please do check once. Thank you.