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1. zebrafish behavior—color preference testing using T-maze, chi-squared analysis, abiotic variable control, single-use animal ethics
2. vitamin C content—extraction and titration using DCPIP, percentage difference between fruits, vitamin C role in blood clotting
3. sunflower stem diameter—mechanical stress effect, t-test for statistical difference, variability plotting and graph interpretation
4. respiratory quotient investigation—mung bean seedling aging effect, RQ calculation, method planning and control of experimental variables
5. data presentation—recording and analyzing RQ trends, statistical evaluation, drawing valid conclusions from biological experiments
6. experimental limitations—sample size constraints, equipment sensitivity, environmental influence on respiration measurements

Edexcel International AS/A Level Biology (WBI) Jun 2022 Biology (WBI) directory

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Classification: Unit 6

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Biology WBI16/01 June 2022 | Edexcel International A Level Past Papers With Mark Scheme

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