Why the same dose of a drug may effect individuals differently?

The following statement about pathogens are true except for one, which statement is not true? a. pathogens belong in the human body b. pathogens can cause infectious diseases c. some pathogens can be classified as animals d. pathogens can multiply inside a host organism

Elderly nursing home residents tend to decline faster and die sooner than they would otherwise if they lacka)biofeedback.b)mindfulness meditation.c)perceived control.d)type a personalities

Someone with my pe hw i need it for tomorrow