Hello dear student, biology is the easiest subject to target to get marks in NEET there are few things that you need to keep in mind to score maximum marks in biology. First thing consider NCERT to be a God and read NCERT line by line as many times as you can is questions that come in NEET revolves around NCERT only and if you have the idea about what they asking in question and if you have studied it in NCERT you can easily answer it. We usually avoid some parts and skip some also which is not going to help you if you want to score 330 in  biology section. If you want to score this much marks then there is nothing particularly important chapter rather all are very important chapters for you. Then they comes main point of solving previous year question papers and then solving MCQs related to every topic and rather say every chapter. Practicing more and more MCQs will only help you to gain marks. I hope this was helpful

best wishes