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Explain why the passenger pigeon, which was once the most abundant bird in north America, disappeared completely.
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How can an organ, such as the lungs, work for multiple body systems?
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Which type of respiration takes place when there is no oxygen present? a. anaerobic b. mitochondrial c. cellular d. aerobica. anaerobic
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Explain why the passenger pigeon, which was once the most abundant bird in north America, disappeare...
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