please tell me did biology comes in general ability test exam in airforce of NDA?
Yes, biology comes in general ability test exam in airforce or NDA examination. But that is not high level biology, the biology questions asked in airforce or NDA examination are upto 10th grade level only. So, you will only have to study upto 10th Science books for preparing for NDA or airforce.
Feel free to ask doubts in the Comment Section.
I hope this information helps you.