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Home Q & A Board Biology-Related Homework Help General Biology
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arealhero arealhero
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9 years ago
Muscle cells of marathon racers contain many mitochondria and use oxygen to break down fats and carbohydrates. Ninety percent of marathon runners’ muscle is made up of _______.
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milestone23milestone23
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9 years ago
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Retired master

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arealhero Author
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#2
9 years ago
This is perfect, thank you for the answer.
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#3
9 years ago
Great!
Retired master
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