Final answer:
Mitochondria are called the powerhouse of the cell because they produce energy in the form of ATP through cellular respiration.
Step-by-step explanation:
Mitochondria are called the powerhouse of the cell because they are responsible for producing energy in the form of a molecule called ATP (adenosine triphosphate).
ATP is the main source of energy for most cellular processes, including metabolism, active transport, and protein synthesis.
The process of converting food molecules into ATP is called cellular respiration, and it takes place in the mitochondria.
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