Biology 9700/52 Oct Nov 2023 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigation of the relationship between rock pool depth and algal species diversity using Spearman’s rank correlation.

2. Variability in scientific reporting affecting reproducibility of investigations in rocky shore ecosystems.

3. Effects of abscisic acid (ABA) and salicylic acid (SA) on rice seedling growth, analyzed through shoot length and 95% confidence intervals.

4. Microarray analysis for gene expression of CDKB2, KRP4, and CycD6 under ABA and SA treatments, focusing on their roles in the mitotic cycle.

5. Gene expression modulation by ABA and SA showing counteractive or additive effects based on observed mRNA levels.

6. Experimental design considerations for testing hormone transport pathways in plant tissues.