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Question generated: Which statement describes how muscles work to allow a person to extend an arm from a curled position by straightening the elbow?

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Question generated: Inside cells, special molecules carry messages from the membrane to the nucleus. Which body system uses a similar process?

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Question generated: Secondary succession is a process that reestablishes a previously colonized, but disturbed or damaged habitat. Which will most likely result in colonization by large herbivores and carnivores?

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Genes are unable to determine a person's