Biology 9700/51 Oct Nov 2018 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigation of transpiration rates using a potometer, including the effects of light intensity and carbon dioxide concentrations on water loss and the impact of controlled environmental variables.

2. Analysis of percentage reductions in transpiration rates under varying light and CO₂ conditions and the validity of conclusions drawn from experimental data.

3. Use of the disc diffusion method to assess antibiotic resistance in E. coli, with a focus on standardized variables, sensitivity determination, and analysis of inhibition zones.

4. Examination of antibiotic prescription patterns and resistance rates, interpretation of standard deviations, and Spearman's rank correlation results to evaluate statistical significance in resistance trends.

5. Gender and age-related trends in ampicillin resistance, including graphical interpretation and explanations of demographic variations in resistance patterns.

6. Application of statistical methods and correlation tests in microbial studies to establish relationships between antibiotic usage and the prevalence of resistant bacterial strains.