My Interest Biology Experiment - 2

<Observation of Osmosis in the onion cell.>


Vocabulary

Osmosis : you could look as it as a movement of solvent molecules due to the difference in molecule pressure between two or more solution mixed.

So, to make it clear if a substance is putted in to a solution which has higher density of solute molecules the solvent molecules move out of it's original substance.

Experiment  NO. - 1

Putting the onion cell in to a salt solution for 5 min.

This picture on the left is the picture taken from a normal onion cell before any experiment has been done to the cell.
(Picture taken my a microscope of X 400)

From this picture we can see that the cell membrane is attached tightly to the cell wall of the onion cell.

Showing us that the cell is at it's normal state.







Moving on, this picture on the right is the picture taken from a cell which have been soaked in a salt solution for 5 mins.



We can see that the cell membrane is starting to get separated from the cell wall. Due to the osmosis effect which drained the water from inside the cell to the outside of the cell.




Experiment NO. -2

This time we dumped the cell in to the salt solution for 10 mins straight and observed it.

The cell membrane was more separated from the cell wall than the previous experiment. And there were even cells which were completely detached from the wall itself.





Experiment NO. -3

Last experiment, we put the cell in to the salt solution for 15 mins.
The results were a more elaborated result of the 10 mins experiment

Some of the cell membrane have shriveled completely that they were no longer visible.

And form these three experiments we were able to conclude that the more time given for osmosis to happen the more dynamic movement happened, until a equilibrium is made between the two solutions.

And also the longer you soak it the longer it took for the cell to recover it's original shape when putted in to pure water.



THE END.