Biology 9700/35 May June 2012 | Cambridge AS Level Past Papers With Mark Scheme
1. Impact of sodium chloride concentration on plant tissue flexibility and osmotic behavior; reliability enhancements in bending angle measurement.
2. Comparative staining effects of iodine and methylene blue on plant cells; observable differences in stained cellular components.
3. Plan diagram of vascular tissue sections; ratio calculation of cell dimensions in a photomicrograph.
4. Sugar concentration changes in leaves and phloem under light and dark conditions; graphical analysis and explanation of trends.

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