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This document describes an experiment on membrane permeability using onion cells. It defines key terms like selectively permeable membrane, diffusion, osmosis, and tonicity. The procedure observes onion cells mounted in distilled water (hypotonic) and 20% NaCl solution (hypertonic) under a microscope. In distilled water, the cell contents appeared normal due to water entering the cell. In the hypertonic solution, the cell lost water and its contents shrank away from the cell wall, demonstrating plasmolysis.
- Author
- Ravina Saravanan
- Language
- EN