Biology · May / June 2019 · Paper 12 · Question 17
The table shows the percentages of four gases in inspired and expired air. Which gas is carbon dioxide?
- A0.04 / 4.14
- B0.50 / 2.00
- C20.80 / 12.20
- D78.50 / 78.50
As printed in the paper
Show the answer
Correct answer: A. 0.04 / 4.14
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