If each human lung contains about 300 million alveoli with a summed total surface area for gas exchange of 40 square meters, what is the approximate surface area of a single alveolus?
A. 750 square micrometers
B. 133 square millimeters
C. 7.5 square micrometers
D. 7.5 square millimeters
E. 0.133 square micrometers
F. 1.33 square micrometers
Answer: E
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What is the specific location of a gene on a chromosome?
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