How do researchers most often investigate the
role of the gut microbiome?
A. They use adult human subjects.
B. They use clinically depressed patients.
C. They use germ-free mice.
D. They use bacteria models.

Mitochondria is the cell organelle that produced the energy that is needed in the body system in form of atp, that is why it is called the power house of the cell. energy is needed by the living organisms to carry out the activities which sustain life.  if the mitochondria is destroyed atp will not be produced. if the mitochondria is destroyed, energy production will stop and the affected living organism will not have the energy to carry out the necessary life processes; this will lead to the death of the organism.

If the experiment was perfomed more then once and you get the same results