Gas exchange, waste removal and the maintenance of a stable internal environment.
27 past Biology questions on this topic, spanning 2015 to 2025, grouped by year. Every question opens on the exact page of the official paper, with its marking scheme beside it.
Every past question on this topic, taken from the official exam papers and set out for printing. Free, no sign-up.
Every past question on this topic, taken from the official exam papers and set out for printing. Free, no sign-up.
Questions come from the official State Examinations Commission papers. Every link opens the original PDF on examinations.ie. The topic packs reproduce the same questions unchanged, with the year, paper and question number printed on each one.