Here is a list of practicals for the core topics you might want to study for:
MAB:
-Effects of temperature/pH/substate concentration on enzyme activity
-Effects of carbon Diioxide dissolving into water
-Longitudinal/Transverse cross sections of the PLoem and Xylem tissue
-Red Blood Cell size
-Dissection of the mammalian kidney
-Structures in plants that aid in reduced waterloss
BOL:
-Modelling natural selection
-Comparative anatomy of homologous forelimb structures
-Constructing pedigrees
-Effect of environment on phenotype
-Model polypeptide synthesis/DNA replication
TSFBH:
-Microbes in food or water
-Model Pasteur's experiment
-Evidence of pathogens on plants
Not sure what option your doing, so I can't help you there...