Process Of Preparing Epithelial Tissue From An Onion

Question 1

Step 1 of Preparing Epithelial Tissue From An Onion.

Answer 1

Use fine forceps to peel of the eperdermis from the inner curved surface of the onion.

Question 2

Step 2 of Preparing Epithelial Tissue From An Onion

Answer 2

Place the film of tissue on a microscope slide.

Question 3

Step 3 of Preparing Epithelial Tissue From An Onion

Answer 3

Add a drop of iodine, wait for 1 minute and then cover the specimen with a cover slip.

Question 4

Step 4 of Preparing Epithelial Tissue From An Onion

Answer 4

Leave the slide for 2 minutes to allow the iodine to penetrate the tissue.

Question 5

Step 5 of Preparing Epithelial Tissue From An Onion

Answer 5

Iodine will stain the living contents of the cell pale yellow, but the nucleus will take up more stain/ take up the stain more strongly than the cytoplasm.

Question 6

Step 6 of Preparing Epithelial Tissue From An Onion

Answer 6

Examine the cells at low and high power.

Question 7

Step 7 of Preparing Epithelial Tissue From An Onion

Answer 7

Review the table - see what defines a good biological drawing.

Question 8

Step 8 of Preparing Epithelial Tissue From An Onion

Answer 8

Draw several cells on a high power.

Question 9

Step 9 of Preparing Epithelial Tissue From An Onion

Answer 9

Check the criteria and score yourself 1 out of 10.