Question

why mitochondria considered as cell within cell?​

Answer 1

Answer:

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Mitochondria are tiny organelles inside cells that are involved in releasing energy from food. This process is known as cellular respiration. It is for this reason that mitochondria are often referred to as the powerhouses of the cell.

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Answer 2

Answer:

Mitochondria are the energy factories of the cell. They produce energy needed by the cell at large. The DNA of a cell is restricted to the nucleus of the cell. ... This is why mitochondria is likened to a cell within a cell.