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The presence of harmful substances in the earths atmosphere is called earth pollution
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Astructural difference between the trachea and esophagus that prevents the trachea from collapsing is the presence of: a) smooth muscle b) skeletal muscle c) respiratory cilia d) rings of cartilage
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Which term defines one's age as measured by how well the body is working? chronological age biological age social age mental age
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The presence of harmful substances in the earths atmosphere is called earth pollution...
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