To remember the processes that define living things:

 Mnemonic:
MRS GREN: Movement; Respiration; Sensation; Growth; Reproduction; Excretion; Nutrition

 Mnemonic:
Metabolism; Response; Homeostasis; Growth; Reproduction; Nutrition:


My Really Hungry Grasshopper Refuses Neglect


 Mnemonic:
My Really Hungry Grasshopper Refuses Neglect