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Question generated: To pump blood through the body, the heart must overcome the force of gravity. Which body position would require the least work from the heart?

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Question generated: In a closed system, what happens to the total energy of the system as energy conversions take place?

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Question generated: Which action forms a different chemical substance?

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Question generated:
If two organisms are classified in different orders but are in the same class, which of these statements is true?