Biology 9700/05 May June 2006 | Cambridge AS Level Past Papers With Mark Scheme

1. Measuring oxygen consumption in germinating seeds using respirometer setups; calculating volumes and respiratory quotients.

2. Enhanced manometer apparatus advantages for accurate respiration experiments; adaptations for green pond weed studies with sodium hydrogen carbonate solutions.

3. Photosynthetic rate effects from bicarbonate concentration; movement of manometer fluid explained by gas exchange differences.

4. Drawing and calculating magnifications of leaf transverse sections; annotating xerophytic adaptations in stomata and surrounding tissues.

5. Xerophyte leaf features: sunken stomata and thick cuticle for reduced water loss in arid conditions.