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1. Investigation of hydrochloric acid diffusion in agar using serial dilutions and measurement of diffusion distances to calculate rates.

2. Practical adaptations for accuracy, including well placement in agar and modified procedures to monitor diffusion rate changes.

3. Analysis of facilitated diffusion of alanine in the small intestine, focusing on graph interpretation and saturation effects.

4. Comparative analysis of plant stem cross-sections through drawings and similarities in observable structures like xylem vessels.

5. Percentage width calculation of stem layers, emphasizing quantitative analysis and mean determination for structural studies.

6. Methodological focus on experimental setup, data representation, and structural comparisons in plant biology practicals.

CIE AS & A Level Biology (9700) Nov 2023 Biology (9700) directory

Laura Bellini

Classification: Paper 3

Page count: 16

Viewed: 155

Last update: 3 months ago

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Biology 9700/36 Oct Nov 2023 | Cambridge AS Level Past Papers With Mark Scheme

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