Biology 9700/34 May June 2019 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigating plasmolysis in onion cells under different sodium chloride concentrations, analyzing water potential effects on cellular structures.

2. Observing potato tissue length changes in sucrose solutions, assessing water movement trends and water potential relationships.

3. Measuring transpiration rates in plants under varying humidity and temperature conditions, analyzing water loss and environmental factors.

4. Effect of carbon dioxide concentration on stomatal density, calculating means, plotting data trends, and interpreting stomatal behavior.

5. Calculating the actual width of vascular bundles in stained leaf sections using calibrated eyepiece graticules.

6. Creating accurate plan diagrams of leaf cross-sections, emphasizing tissue structure and proportional representation.