Biology 9700/32 May June 2018 | Cambridge AS Level Past Papers With Mark Scheme

1. Effect of hydrochloric acid concentration on diffusion rates in agar cubes, with proportional dilutions and endpoint color change observations.

2. Zone of inhibition measurement in agar plates to assess the antibacterial efficacy of chemical C against various pathogenic bacteria.

3. Drawing and labeling of plant leaf midrib sections, including vascular tissues and upper epidermis without guard cells.

4. Calculation of total and vascular bundle areas in photomicrographs, determining the percentage area occupied by vascular bundles.

5. Comparative analysis of structural differences between plant leaf specimens from M1 and photomicrographs.