Here are the correct answers to your questions:
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Which of the following is a reactant of cellular respiration?
- oxygen.
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What is the definition of cellular respiration?
- the process of using the chemical energy from food and oxygen molecules to power life processes.
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Which molecule carries energy inside cells?
- ATP.
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Which statement is true?
- Cellular respiration takes place in the cytoplasm and mitochondria.
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Which statement correctly classifies ATP, cytoplasm, and mitochondria?
- ATP is found in mitochondria, and mitochondria are found in the cytoplasm.
If you have any more questions, feel free to ask!