Biology 9700/35 May June 2010 | Cambridge AS Level Past Papers With Mark Scheme

1. Determination of water potential for solutions A and B using plant tissue immersion and movement of dyed solution drops in sucrose gradients.

2. Preparation of sucrose dilutions by combining specific volumes of stock solution and distilled water, and observation of drop behavior for concentration estimation.

3. Graph plotting of sucrose concentration versus water potential, utilizing recorded data to estimate water potential values of unknown samples.

4. Improvements in water potential estimation via refined drop volume measurement, additional sucrose concentrations, and repeated trials for accuracy.

5. Comparative analysis of mammalian trachea transverse sections, including cartilage structure, epithelial layers, and lumen size.

6. Magnification-based measurement of lumen diameter, recording calculations, and drawing detailed structural diagrams to illustrate tissue differences.

7. Examination of tubular structures in mammals, noting distinctions in cartilage rings and other cellular arrangements through annotated drawings and labels.