By: Ruth Noble, Teacher of Biology |
On Tuesday 13th November, Year 12 biologists observed the process of osmosis in a plant cell. They used red onion so they could see the cell contents as they are a beautiful pink colour. The students subjected these cells to two different conditions;
- They added sodium chloride solution and then they removed the sodium chloride and added
- Distilled water.
The purpose of this was to observe plasmolysis when sodium chloride was added and turgor when distilled water is present. I think you will agree the students produced some lovely specimens and were able to observe this crucial process of osmosis.
The pictures below are from three students; Laetitia Altenburg, Nici Quadflieg and Gaby Antoci.
Laetitia Altenburg
Below: Red Onion Epidermis – magnification x400 – with sodium chloride solution.
Below: Red Onion Epidermis – magnification x100 – with sodium chloride solution.
Gabi Antoci
Below: Red onion epidermal cells in NaCl solution – magnification x400
Nici Quadflieg
Below: Red onion epidermal cells – magnification x100
Below: Red onion epidermal cells – magnification x100
Below: Red onion epidermal – magnification x400
