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12 (b) The student investigated the effect of auxin concentration on the growth of shoots. The student applied different concentrations of auxin to the apical
12 (b) The student investigated the effect of auxin concentration on the growth of shoots. The student applied different concentrations of auxin to the apical shoot and the lateral shoots. The student measured the percentage of growth stimulation or inhibition compared to normal. Normal growth was represented by 0%. The student's results are shown in the graph. Stimulation of growth 100 (%) 0 Inhibition of growth (%) =100 10-2 10" 10 10 10 107 10 105 10* 103 Auxin concentration (mol dm=3) Key: X =lateral shoots A = apical shoot (i) Use the graph to estimate the auxin concentration at which inhibition of lateral shoots is 100%. Auxin concentration = ..........cooeeieiieiieiiee e moldm=3[1] (ii) The student identified a possible anomaly in their results: the data point for the apical shoot receiving 10~ moldm of auxin. State what the student could do to determine whether this data point was an anomaly
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