Answer:
B: an atom
Explanation:
An atom is the smallest substance that can exist in isolation.
Hence, if a piece of copper is continually divided, eventually the smallest particle you would get in an atom.
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The speed of a chemical reaction when a catalyst is present is that it. A.) It speeds up
Answer:
Mitochondria: It is also called power house of the cell because it genetates or produces energy for the cell which is required for different functions. The glucose which is absorbed by the body is taken to the cell and from there the glucose is entered in the mitochondria. The mitochondria start break down of the glucose molecule and generates energy in the form of Adenine tri phosphate (ATP).