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Which of the following is responsible for holding the lungs to the thorax wall? a. the visceral pleurae and the changing volume of the lungs b. the diaphragm and the intercostal muscles alone c. the smooth muscles of the lung d. surface tension from pleural fluid and negative pressure in the pleural cavity
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In natural selection, what is actually “selected? ” a) alleles are directly selected b) genotypes are directly selected c) phenotypes are directly selected d) entire populations are directly selected
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What organ is the first to receive nutrients that have been absorbed from the digestive tract?
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Which of the following is responsible for holding the lungs to the thorax wall? a. the visceral pleu...
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