Well, when i started my very first bio class, the teachers made it very clear that its super duper hard and some students who previously gotten A had dropped their grades or may even fail and etc etc but then i think it really depends on you? For me, i like biology, i find it most interesting out of the rest of the subjects I'm taking, and it seems like no different than your ordinary biology class? Just pay attention and do all the work, i think you'll be fine!
Lets put it this way, O-Level biology is just like a summary for A-Level biology. Haha but im sure, A-Level biology would almost be like a summary for university courses as well 😂 But remember, as we progress in our studies, its just gonna get harder and tougher, its just how it works? I used to think O-Levels is like the ULTIMATE exam to prepare for to determine your future blah blah blah and i used to think that it was one of the hardest exams to do but when i started A-Levels, i realised O-Levels is like nothing much really..the really basic stuff. 😨 Haha, we all gotta start somewhere right?