Eukaryotic Cell Lab

Introduction
Using microscopes allows humans to see things they’ve otherwise would have never seen before, like cells. A cell is the basic unit of life. All living things are made of cells. All cells come from preexisting cells through a process called cellular division. There are two types of cells, eukaryotes and prokaryotes. Prokaryotes are very simple and small. They are unicellular and have no membrane bound organelles. Their DNA is found directly in the cytoplasm since they have no nucleus. Eukaryotes are much more complex and bigger. They have membrane bound organelles for specific functions. Some organelles inside eukaryotic cells include: the nucleus, the golgi apparatus, the mitochondria, the chloroplast, the endoplasmic reticulum
Then the student carefully and correctly carried the microscope back to the desk by having one hand wrapped around the arm of the microscope and the other hand placed under the base of the microscope. Once the student got the microscope to the desk, the student walked to the front of the room where the onion section was set up. Once the student got there, the student picked up an onion and peeled a rather thin piece of the skin from the inner surface of the onion. The student then picked up a scalpel and carefully cut a very thin and small piece off the onion skin. Once the student got the desired piece, the student prepared the slide. First, the student acquired a glass slide then the student put the thin piece of onion skin on the slide. The student made sure that the onion skin wasn’t folded over itself. After that, the student used the medicine dropper and dropped a small bead of water on top of the onion skin. Once the onion skin was covered the student used the medicine dropper and dropped the tiniest amount of iodine in the water directly on top of the onion skin. Finally, the student picked up a coverslip and placed it carefully on top of the onion skin. Once completed, the student walked back to the desk and put the slide on the microscope. The student then looked for the onion cells under low power. The student first used the coarse adjustment knob on the
Data
There were more cells in the field of view under the low power objective and as the magnification changed to high power, the number of cells in view decreased.
Under low power in the microscope, the cheek cells looked like very tiny, dark circular flakes. Under high power, the cheek cells got much bigger. A dark dot in the cell and a dark layer outlining the cell were now visible.
Under low power in the microscope, the onion cells looked like tiny, rectangular shapes. Almost like a brick wall. Some of the cells had very faint, dark dots in them. Under high power, the onion cells got much bigger. Inside the cells, there were dark dots, a dark outer layer outlining the cells, and a fainter, but still visible, inner layer also outlining the cell.
Also noticeable was that the onion cells were grouped together in a large group whereas the cheek cells were scattered about.
*see attached drawings* V.