Why are frogs said to have two life's

Frogs are said to have two lives because when they hatch, they turn into little fish-like creatures known as pollywogs that live underwater. This is considered their first life. Then, the pollywogs mature into tadpoles and start budding limbs. Finally, after a while in this stage, their arms and legs will become fully developed, making them frogs and they will leave the water to live the rest of their life without needing water as their primary environment. This is considered their second life.
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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.