Biology 9700/31 May June 2018 | Cambridge AS Level Past Papers With Mark Scheme

1. Estimating protein concentrations in milk samples using the biuret test and analyzing coagulation under acidic conditions.

2. Investigating the effect of temperature on rennet activity by measuring milk coagulation percentages at different temperatures.

3. Drawing and labeling plant leaf cross-sections, focusing on vascular bundles and epidermal features.

4. Calculating actual leaf dimensions using stage micrometer calibration and comparing anatomical differences between leaf specimens.

5. Identifying xerophytic adaptations in plant leaves to explain water loss prevention in dry environments.