A theory is an explanation for observable events or patterns in nature... Any valid scientific theory has passed tests designed to invalidate it. (Ex: Big Bang Theory.)
A hypotheses is simply a suggested answer to a question or problem. An educated guess if you will.
Answer:
creatures that live on earth
ADP can be converted into ATP during the addition of an inorganic phosphate. This process can be represented as phosphorylation, as molecules are simply having phosphate groups chemically added on to them, thus providing them with greater deal of energy through the new chemical bond that forms with the phosphate group.