There are many internal factors which living organisms respond to, two of them are temperature and hormone levels. Organisms respond to internal factors in order to stay healthy and survive. The internal environment of living organisms has to be kept relatively constant, this is constancy is achieved through the process of homeostasis.
Milk, Blood, Coffee, Water, Urine, Gasoline, Wine
A hypothesis Is when someone thinks of the answer and a theory is when a group of people think of an answer
Sterile water is most often used
