Biology 9700/53 Oct Nov 2016 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigating calcium chloride effects on stomatal opening and closing, analyzing stomatal aperture response under varying conditions.

2. Testing hypothesis that ABA impacts stomatal behavior differently on upper and lower leaf epidermis.

3. Statistical analysis of stomatal aperture data using 95% confidence limits and selecting appropriate significance tests.

4. Barley and couch grass competition experiments, hypothesizing inhibitory effects of couch grass root exudates on barley roots.

5. Biodiversity impact assessment in pesticide-treated versus untreated barley fields using Simpson's Index of Diversity.