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Which process causes the leaves of a plant to become larger?

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A student flips a coin four times. It lands "heads" up three times. The student concludes that the coin will land "heads" up three times out of four. What will make the conclusion more accurate?

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What is the main function of scales on a fish?

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An ocean, a forest, and a grassy meadow are each examples of a complete ecosystem. Complete ecosystems contain only