To get a good mark in an a level biology exam, do I have to memorise everything in the textbook (especially the bullet points). I'm asking this because im worried that the textbook will go far too in depth and there may be some stuff that I dont need to know (some bullet points may be for my understanding). I tried to use the spec, but in my opinion it is very vauge. after i memorise a topic ill do pat paper questions. I'm just not sure if i should skip some parts of the textook out.