Determine the rate of diffusion in the gas-exchange organ of an air-breathing animal where the area for gas exchange in the lung is 200 mm2,
the diffusion constant is 0.08, the (partial pressure of oxygen) of the air in the lung is 140 mm Hg, the in blood flowing into the lung is 90 mmHg, and the thickness of the gas exchange membrane is 0.001 mm.
A) 800,000
B) 125
C) 00032
D) 10,000,000
Answer: A
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Several different researchers all contributed to the study of the structure of DNA. For each of the following researchers, match their contribution.
A. Rosalind Franklin B. Frederick Griffith C. Oswald Avery D. Erwin Chargaff
Which of these describes the type of reproduction that is most adaptive in a rapidly changing environment with many different parasitic diseases present?
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In humans, individuals with trisomy of the ________ chromosome are most likely to survive until adulthood.
A. 13th. B. 18th. C. 21st. D. 3rd. E. 15th.