There's absolutely no prelim bio in hsc bio (unless theres a dot point on it such as diffusion and xylem)
Its useful to know the prelim shit because it will make your understanding a little bit easier however you don't need to know it for year 12
I Didn't listen at all last year, was ranked ~30th, I failed like every exam (bio was the subject I was going to drop). However this year, I am coming 2nd and if you gave me a prelim exam I would probably fail it.