biology or economics? which one is better?
I either plan to do something healthcare/medicine/allied health related or accounting/banking/finance related in uni.
Is bio necessary in uni for med or the allied healths?
Depends what kinda person you are, I usually see Maths/Science or Humanities student, but in saying that Biology is kind of 'recommended knowledge' for Medicine and the other Health subjects.
Biology is technically the lowest scaling of the three Sciences (Chem, Phys then Bio), probably because in Science, teachers don't want to you write as much as you want but rather want you to get to the point, they also want you to use the correct terminology and words or otherwise you lose marks (seriously). However don't let scaling out you off, if you truly love Science then pick the subject and if you think it'll help towards university prerequisites and assumed knowledge, then by all means take. Also I think Y11 Bio is really boring, in Y12, I think it gets better and you have options (Communication, Human Story, Genetics etc)
Economics scales higher than most Humanities students and thus higher than Bio because there is A LOT of memorisation and the subject basically tests your memory and ability to regurgitate and apply information. In Economics, you'll get a lot of essays, short answers and all that sort of stuff, (Bio doesn't really have essays, just SA and MC). Take this subject if you love essay-writing and it'll help you in the business and economical sector, but if you feel you are struggling in this subject, get out ASAP, my school sees Economics as the most dropped subject (usually half the cohort drops eg 70 kids to 30 ish kids) , mainly because there's so much content and memorisation involved and they can't keep up.
Basically choose the one you love more, and don't let external factors such as scaling influence your decision, but in saying that, Bio is probably 'required' for uni medicine and stuff, yeah I'm not really sure, maybe ask in a new thread or something?