Biology · Oct / Nov 2023 · Paper 22 · Question 4
5090
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Fig. 4.1 shows a Siamese fighting fish that lives in fresh water. large colourful fin location of an organ that can be filled with atmospheric air Fig. 4.1 Fig. 4.2 shows the effect of changing pH on the solubility of oxygen in water. 0 40 6.0 6.5 7.0 7.5 pH of water percentage solubility of oxygen in water 8.0 8.5 9.0 80 20 60 100 Fig. 4.2 11 Fig. 4.3 shows the effect of changing temperature on the solubility of oxygen in water. 5 7 0 10 20 30 temperature of water / °C oxygen solubility in water / mg per dm3 40 50 5 15 25 35 45 9 11 13 6 8 10 12 15 14 Fig. 4.3
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4(a)(i)[3]
4(a)(ii)[4]
4(b)(i)[1]
4(b)(ii)[1]
4(b)(iii)[1]
4(c)[5]
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