Elodea – under water,
chloroplasts should be moving in circular motion along cell wall
Elodea Stained (we used yellow lugol’s solution, blue stain was used in picture)
Nucleus becomes visible
Onion Cell.
If you were lucky you could see the nucleus. They were fainter for us.
Carrot Cell (red pepper on left, but similar for demonstrative purposes)
Red Chromoplasts, different than green Chloroplasts
Celery
Lettuce.
The cat-eye or donut shape in the center is a stomata. A cell that controls the passage of gases and
water vaper into and out of the leaf.
Potato Cells
Dark Ovoids are stained leukoplasts, parts of the cell containing starch
Banana Cells
Left not stained (clear starch cells), Right stained with iodine = purple starch cells
Human Cheek Cells
Left, parts identified, Right same stain we used in class
Not a great picture.
Yogurt. The clear circular shapes are the bacteria. Dark parts are lactose-based parts of yogurt.
youtube link to video (note we didn’t have any of the long straight bacteria in our sample):
http://www.youtube.com/watch?v=9HL5iOE3kT8&edufilter=VLnyvXXyX8xSKqaJvnbAeQ
Yeast at various zooms. Ours was more like a and b, perhaps with even higher density.
Mushroom spores.
We had very few slides with this level of clarity.