How does cell theory demonstrate the definition of theory?

The cell theory demonstrates the scientific definition of a theory in three ways. First it has been tested extensively then , it allows researchers who observes evidence of cellular structure in unknown objects to make predictions about the object such as it is a living thing and it can reproduce itself.  

Explanation:

the way that the mass of carbon can be conserved through cellular respiration is through a process/law called the law of conservation of mass which even tho it undergoes a process, mass is not be destroyed or changed

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