Today the students were in the lab again experiencing the wonderful world of cells.
This time however, they were focussed on the plant cell. Let’s take a look…
Allison and Christina give a big “thumbs up” for plant cells…
The purpose of the lab was to look for specific organelles in various plant cells.
The first cell the students were to look at was an onion cell with the goal of locating
the nucleus and nucleoli within it.
Here are some onion cells under low power (10x). Can you see the nuclei?
A closer look shows the nucleus within the cell.
Later will see a really good slide of the nucleus with nucleoli. Be patient…
The second cell the students were to look at was an Elodea (Anachris) cell.
While viewing the Anachris cells, the students were to observe the many chloroplasts
within each cell.
And if they were lucky, they would witness them moving throughout
the cytoplasm through a process known as “cytoplasmic streaming”.
Catherine and Robin are looking at a leaflet of Elodea right now, lets take a look…
Here are some Elodea cells under medium power (100x).
Another view of the Elodea cells shows the chloroplasts nicely.
And these chloroplasts were moving… “cytoplasmic streaming” at it’s best.
Betsy and Hannah are loving plant cells.
They just finished looking at potato cells, observing the many leucoplasts within.
These are potato cells under medium power (100x).
The little clear circles are actually the leucoplasts.
These organelles store starch in plant cells.
Here are the leucoplasts after stained with iodine.
Iodine is often used as a starch indicator, it turns dark blue/black when in contact with starch.
Let’s see how the afternoon class did with this lab.
Nicole, Michelle, and Cheyenne are looking at an onion cell.
Here is the onion cell with it’s nucleus again under medium power (100x).
Under high power (400x), you can see the nucleoli within the nucleus.
Here’s a couple of “Super-biologists” loving the field of cytology…
Gil and Jimmy did a real nice job on their Elodea cell slide, but wait until you see
their potato cell slide.
Elodea cells under high power (400x)… very nice!
Here is Gil and Jimmy’s potato cell slide viewed under low power (10x).
Here it is stained with iodine. Now that’s nice!
Here it is under under high power (400x). Look at those leucoplasts… very nice!
Well another lab day comes to an end.
We hope you enjoyed your visit to the “Wonderful World of Cells (Part II)”.
Until next time…