Hello Javed!

In order to get degree in basic science stream such as physics, chemistry, botany or zoology, you have to purse B.Sc. J EE and NEET are the entrance exams for engineering and medical science respectively. However, institutions like IISC, IISER admit students based on JEE and NEET scores if the scores are above their cutoff marks. For most of the other colleges that offer B.Sc, you can get admission through your boards too.

Hope this helps!