Which fossil organism is the oldest? What features does it have which are different from the youngest?

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.

The higher you go up the less oxygen there is 

Retype the question .

Not only is it the purchase of about 40% of america, it also grounds to on-go our advancement as a civilization.