Biology 9700/52 Oct Nov 2020 | Cambridge AS Level Past Papers With Mark Scheme

- Investigation of flower stalk structure and function, including epidermis, cortex, pith, vascular tissue, and support mechanisms.
- Analysis of water potential in flower stalk tissues using sucrose solution concentrations, curvature measurement, and mathematical calculations.
- Experimental design for assessing the impact of weevils on water hyacinth, including treatments with insecticide and control groups.
- Data collection methods for petiole length and feeding scars, emphasizing statistical analysis and standard deviation interpretation.
- Field experiment setup with control and treatment plots, monitoring changes in petiole length and feeding scars over time.
- Application of t-test for data analysis, significance determination, and degrees of freedom calculation in experimental results.