Biology 9700/42 March 2017 | Cambridge AS Level Past Papers With Mark Scheme

1. Water conservation adaptations: nephron structure, urine water potential, and desert animal physiology.
2. Cellular respiration: glycolysis, link reaction, Krebs cycle, oxidative phosphorylation, and anaerobic ATP yield limitations.
3. Plant physiology: germination, auxin impact on cell elongation, pH changes, and cell wall expansion.
4. Photosynthesis: CO₂ concentration effects, C4 vs non-C4 plants, temperature-dependent photosynthetic efficiency.
5. Genetic interactions: flower pigmentation, Punnett square analysis, Hardy-Weinberg equilibrium, heterozygous allele frequency.
6. Environmental impact: deforestation metrics, genetic isolation, orangutan habitat conservation, zoos' role in biodiversity protection.