CAIE IGCSE Biology EXTENDED 13.1.9 Importance of excretion
CAIE IGCSE Biology EXTENDED 13.1.9 Importance of excretion
Practise explaining why metabolic waste must be removed, with urea as the key toxic product that must be excreted.
How this is tested
- state that urea must be excreted because it is toxic or harmful
- explain excretion as removal of metabolic waste or excess harmful substances