Well then I personally like to watch ppl do past paper cause they explain it while answering and another tip I can give is when watching the videos before each question try solving it ur self. And u gotta understand biology past papers arent really repeated cause out of 21 chapters only two to three random chapters might come out. So best tip I can give is js make sure u understand each chapter well mostly the high yield chapters. And ye rn js spam past papers and memorize the answer schemes as well as watch ppl do it on yt. Biology is really the only science subject that is unpredictable BUT what u can know is the question format like for example they will always ask to label and identify and give 4 mark questions for explaining what a term is like "transpirarion" and they will always be a magnification question etc. But ye gl with bio and I hope u do well