hi, got a 9 in bio in the end after consistently scoring 7s/low 8s in my mocks. Honestly the things that everyone tells you to stick to are correct - flashcards, past papers and a whole lot of physicsmathstutor. Use flashcards to basically list out everything you know about for example CHD. Do practice/past papers on the topics you're weak in; with bio, even if you know the material, it is so so so important to understand how to phrase your answers so that they include the keywords mark schemes want. I advise you to use CGP guides as they have good coloured highlighting on key words and revise from them. For 6 markers, it is a lot of practice and tbh, mark scheme learning. gl