<span>January 10, 1863 (aged 87) i am sure
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Life,liberty, and pursuit of happiness
Answer:
Similarity of the drug molecule to other molecules normally transported lung cells.
Explanation:
Similiarity of the drug molecules ot the lung cells would ensure that the drug affects only the lung cells and does not interfere with other tissues. This can also ensure proper absorption and prevent any adverse effects of the drug on other cells, tissues.