In a hypotonic solution like distilled water the onion cell would "swell up" and the cytoplasm expands and water diffuses into the cell
Red onion cells have rigid cell walls composed of cellulose in addition to their plasma membrane.
They get wet. Oh, and the cells swell and may rupture from being placed in a hypotonic solution.
The cell will become turgid
it will change color.
because it already have salt water
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Osmosis takes place. The onion cell will turn flaccid due to the water loss.
Isotonic solution is a solution which contains the same concentration as present in cell. So no osmosis will occur. Hence there will be a neutral effect.
The water turns purple and the skin turns white.
Iodine dyes cells a purple color. This enables things to be seen easier under a microscope.
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I did this experiment and after a while the onion cell became incredibly easier to see.
Osmosis takes place. The onion cell will turn flaccid due to the water loss.
When salt is added to onion cell, the cytoplasm shrink due to plasmolysis. When water is added to onion cell, the cytoplasm expands back to its initial shape due to deplasmolysis.
Isotonic solution is a solution which contains the same concentration as present in cell. So no osmosis will occur. Hence there will be a neutral effect.
Nothing. The onion will get wet.
In a hypotonic environment, an onion cell will fill up with water. Hypotonic refers to a solution that has lower osmotic pressure than the solution you're comparing it to.
This depends on the nature of the NaCl solution...If it is a Hyper-tonic solution (More concentrated solution than onion cells), water will move by osmosis down it's concentration gradient, from a region of less negative water potential (high Ψ) in the onion cell, to a region of more negative water potential (low Ψ) in the solution through a selectively/partially permeable membrane;so the onion cell will be plasmolysed and will look "flaccid" (vacuole gets smaller and shrinks).The vice versa happens with a Hypo-tonic (less concentrated solution than onion cell) NaCl solution;The onion cell will then look "turgid" (has a large vacuole exerting a pressure on the cytoplasm and pushing it towards the cell's cellwall to make it "tensed".
As the "salt solution" is a hypertonic solution which has the concentration of the solute outside of the cell is higher than the inside's. That also means the concentration of the water is now smaller in the outside of the cell than the inside's, which make the water molecules diffuse from the inside of the cell to the outside, resulted in making the cell (onion cell in this case) shrunken, or smaller.
becuse of the lodine solution
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