O-LevelBiologyRespiration5090/11 · Oct/Nov 2016 · Q181 Mark
The diagram shows apparatus used to investigate respiration. [Figure 18.1] Which change will be seen and what is the explanation?
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Achange: oil drop moves left, explanation: oxygen is used up by the peas
Bchange: oil drop does not move, explanation: oxygen is used up as fast as carbon dioxide is released
Cchange: oil drop does not move, explanation: carbon dioxide is absorbed
Dchange: oil drop moves right, explanation: peas release carbon dioxide
✓ Correct answer
A: change: oil drop moves left, explanation: oxygen is used up by the peas
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