Biology · Oct / Nov 2018 · Paper 22 · Question 4
5090
As printed in the paper
The question as text
The graph shows the variation in the concentration of dissolved carbon dioxide in the water of a pond over a period of 24 hours. night night day carbon dioxide concentration of gas time
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Show the answer and mark scheme
4(a)(i)[4]
4(a)(ii)[2]
4(b)[4]
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