1. Osmosis in Plant tissues
2. Demonstration of Osmosis Processes in Non-living System Using an Osmometer
3. Osmosis in Plant cells
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1. In the first one, we used 3 potato strips of around 50 mm each.
We placed each one in different solutions, and found that Strip A increased in length, and Strip B and C decreased in length.
In the case of Strip C it was because the water molecules moved from a region of higher water potential (strip C) to a region of lower water potential (Solution) through a partially permeable plasma membrane. Thus the water potential in the Potato Strip decreased as the water molecules moved out of the cell and it became shorter.
2. In the second experiment, we observed two thistle funnels with cellophane paper tied over the mouth, and placed in a beaker.
Both the beakers were filled with distilled water. One thistle funnel has 50% sucrose solution, and the other with only distilled water.
After thirty minutes, the thistle funnel with sucrose solution in it had a higher water level.
This was because water molecules from there was a net movement of water molecules from the distilled water to the solution inside the funnel through the cellophane paper.
3. In the third experiment, we prepared a slide of a Hydrilla leaf. We observed it
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| Hydrilla leaf under 40x |
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| Hydrilla leaf in salt solution after 15 minutes |
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