Answer:
That answer comes down to their stems
Answer:
All cells in the body have this internal control and most cells only divide between 50-70 times before they stop or die.
The answer to the question that is being stated above would be 'model. A model is a hands-on representation of an actual object. It can also be called as a 'physical model', specifically, if you're referring to a bigger or a smaller representation of an actual object.
They generally test for infections, changes in body tissue and organs, and they test for the presence of chemicals such as drugs or poisons.