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The oldest known stone tools date from between 2.5 and 2 m.y.a.
Packaging Materials
Materials used to protect, store, and transport products, ranging from paper and cardboard to plastics and metals.
Cellular Respiration
The process by which cells convert sugars into energy in the form of ATP, consuming oxygen and releasing carbon dioxide.
Mitochondria
Mitochondria are organelles within cells that are responsible for producing adenosine triphosphate (ATP), the cell's main energy carrier, through the process of oxidative phosphorylation.
ATP
Adenosine triphosphate, a molecule that carries energy within cells for metabolism.
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