is this an actual part of mod 5 for bio or is it just extension stuff? my school teaches it but the in focus and pearson textbooks both have it as extension (in focus doesn't even go through it in proper detail)
I dont think its examined in the hsc yet (or in the syllabus) but we learnt this in class aswell. If your school covers it, it may still appear in your trial exams so you should know it. Don't worry its quite simple and not as weird as it looks!