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Question generated: When a book is dropped onto a wooden desk, the molecules in the wood begin to vibrate from the force of the book. Which of these is produced by the vibrations?

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Question generated: What is significant about the discovery of water on Mars?

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Question generated: A recent scientific study funded by a medical corporation concluded that its product is not as harmful as consumers have reported. Identify a possible problem with this study.

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Question generated:
Which of these is the main function of a cell wall?