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    Biology
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    Cardiopulmonary Anatomy
  4. Exam
    Exam 4: The Diffusion of Pulmonary Gases
  5. Question
    What Percentage of the Atmosphere Does Oxygen Compose
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What Percentage of the Atmosphere Does Oxygen Compose

Question 3

Question 3

Multiple Choice

What percentage of the atmosphere does oxygen compose?


A) 58%
B) 21%
C) 46%
D) 29%

Correct Answer:

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