Biology · Oct / Nov 2019 · Paper 11 · Question 18
The pie charts show the proportions of gases in samples of inspired and expired air. Which segments represent which gases?
- Asegment 1: nitrogen; segment 2: other gases; segment 3: oxygen
- Bsegment 1: nitrogen; segment 2: oxygen; segment 3: other gases
- Csegment 1: oxygen; segment 2: other gases; segment 3: nitrogen
- Dsegment 1: oxygen; segment 2: other gases; segment 3: carbon dioxide
As printed in the paper
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Correct answer: B. segment 1: nitrogen; segment 2: oxygen; segment 3: other gases
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