15. ANIMALS CELLS vs PLANTS CELLS

INTRODUCTION:

In this experiment we will se the difference between animal cells and plant cells, using different food (onion).

OBJECTIVES:

1. Identify the major components of cells. 

2. Differemtiate between animal and plant cells. 

3. Measure dimensions of the entire cell and nucleus. 

PROCEDURE:

Plants cells observation

1.  Pour some distilled water into a watch glass. 

2. Peel off the leaf from half a piece of onion and using forceps, pull out a piece of transparent onion peel (epiderms) from the leaf. 

3. Put the epiderms in the watch glass containing distilled water. 

4. Take a few drops of iodine solution (or safranin) in a dropper and transfer into another watch glass. 

5. Using a brush (or a needle), transfer the peel into the watch glass containing the dye. Let this remain in the safranin solution (or iodine) for 30 seconds, so that peel is stained. 

6. Take the peel from the iodine solution and place it in the watcg glass containing distilled water. 

7. Take a few drops of glycerine in a dropper and pour 2 or 3 drops at the center of a dry glass slide. 

8. Using the brush, place the peel onto the slide containing glycerine. 

9. Take a cover slip and place it gently on the peel with the aid of a needle. 

10. Remove the extra glycerine using cellulose paper. 

11. View in the microscope. 

RESULTS:

In this image we saw the nucleotids, stomas (to do the gases change: CO2 --> O2) and the cellular membrane.