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Descriptive Statistics. Descriptive statistics are numbers that are used to summarize and describe data. The word "data" refers to the information that has been collected from an experiment, a survey, a historical record, etc.
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The correct answer is A: Increased sewage system failures
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carbon dioxide is correct
The correct answer is 1, tight junctions. Tight junctions are the junctions seal adjacent epithelial cells in a narrow band just beneath their apical surface. They contain a network of claudins and other proteins. They limit the passage of molecules and ions through the space between cells.