In your study of physiology and biology, you will no doubt have come across the concept of organisms being based on organs which are in turn based on cells. Not all cells are the same and it turns out that complex life requires a rich diversity of cell types. In order to understand biological systems most students will have studied the cell, its specialist components, and their functions. From here, students typically study the different forms of cells (prokaryotes vs eukaryotes etc.) and the different forms of life (single-cell organisms vs multicellular complex life).
GAMSAT candidates often ask how to study for GAMSAT Section III. A useful way to begin can be to focus on the physical sciences and work your way up.
The physical sciences lie at the heart of all the other disciplines relevant to Section III of GAMSAT. This is reflected in the hierarchy of sciences: