Biology 9700/31 Oct Nov 2015 | Cambridge AS Level Past Papers With Mark Scheme

1. Serial dilution techniques to prepare sodium chloride solutions for investigating plant tissue staining.
2. Control and standardization of variables in practical experiments using plant tissues and sodium chloride solutions.
3. Osmosis and its effects on plant tissue coloration and water potential gradient responses.
4. Graphical representation and analysis of root growth under varying sodium chloride concentrations.
5. Modifications for experimental designs to test the effect of temperature on root growth.
6. Microscopic examination and comparison of xerophytic adaptations in plant leaves to assess structural features for water conservation.