The onion epidermis cell is the only cell that has a cell wall in addition, it is the only cell that has a chloroplast, where the photosynthesis can happen the cheek epithelium cell is the only one that has centrioles, the barrel-shaped organelle that is responsible for helping organize chromosomes during cell division. Cells on slide so that the cells will not get washed away while staining 3 put a few drops of methyl green-pyronine y stain and leave for 5-10 min for staining. Diagram human cheek cells and label the cell membrane, cytoplasm, and nucleus measure the diameter of hu man cheek cells in micrometers compare and contrast cheek (animal) cells with onion (plant) cells.
Cell size experiment - use agar and a basic solution to illustrate how fast fluids can diffuse into a cell, dependent on cell size cell reproduction mitosis in an onion - view picture, identify the stages of mitosis in each of the cells. Cell size lab: comparing cheek, onion and elodea cells cells are almost always small so small you usually need a microscope to view them cells are small because as they get larger, their surface area to volume ratio becomes too small to bring in enough nutrients and get rid of enough wastes for survival. Cheek cells are simple squamous epithelial cells you can find out by looking at them under a microscope, doing a google search or reading a book 12k views answer requested by. Best answer: elodea cells, cheek cells, and onion cells are all eukaryotic visibly, they all have nuclei and cell membranes elodea cells and onion cells are both plant cells, while cheek cells are animal cells (humans are animals.
Purpose: to further the students understanding of cells and to give them the experience of using a microscope materials: microscope, microscope slide, cover slip, toothpick, onion, iodine stain, methylene blue stain, dropper bottle of water. Estimate the size of a typical cheek cell record the cell size and magnification used 44 b plant cells exercise 310 - prepare a wet mount of elodea cells 4 estimate the size of a typical elodea cell. Name%_____%date%_____%adv%_____% cheek and onion cell lab background today%for%this%laboratory%we%will%be%using%a%compound%light%microscope%a%microscope,%from%the. While both onion and human cells have a cell membrane, only the onion has a cell wall both plant and animal cells, including human epithelial, and onion epidermal cells have a structure called a cell membrane or plasma membrane.
C beneath the drawing label the picture identifying the cells and give the magnification, such as cheek cells - 40x or onion cells with iodine-100x d. Page 2 b cheek epthelial cells 1 put a small drop of water on a clean slide 2 with the broad end of a toothpick, gently scrape the inside lining of your cheek 3 deposit a little of the scraping in the drop of water by rolling the toothpick in the. Thisworkissupportedinpartbyagranttolouisianastateuniversityfromthehowardhughesmedicalinstitutethrough theprecollegeandundergraduatescienceeducationprogram.
The nucleus at the central part of the cheek cell contains dna when a drop of methylene blue is introduced, the nucleus is stained, which makes it stand out and be clearly seen under the microscope although the entire cell appears light blue in color, the nucleus at the central part of the cell is much darker, which allows it to be identified. The onion cell is a plant cell and the human cheek cell is an animal cell the onion cell would have cell wall, vacuole, and granules of starch or oils the animal cell would have none of these. This simple investigation asks students to view cells under the microscope and compare differences between plant and animal cells students are instructed in the procedure for removing the epithelial cells of an onion and staining with iodine. Best answer: well i'll start from the beginning 1) the animal cells (cheek cells) do not have cell walls so in fact they are not as tightly packed as onion cells.
Part 2: onion epidermal cells the epidermis or skin of an onion is an ideal subject for the study of cells because it is composed of a single layer of cells and you can distinguish several individual organelles. Cell walls in plants are rigid, compared to other organisms the cellulose present in the cell walls forms clearly defined tiles in onion cells the tiles look very similar to rectangular bricks laid in offset runs. The shapes of cheek cells are irregular in shape, but elodea cells and onion bulb cells are regular in shape structures that are involved in determining a cells shapes are the cell walls because they provide structure and stability for the organism they are in 7. In this investigation, you will compare the structures of 2 typical plant cells, onion and anacharis- a common aquarium plant, with a human cheek cell and yogurt bacterial cells problem: how are prokaryotic and eukaryotic (plant and animal) cells alike and how are they.
Observe animal cells from their own cheek using a compound light microscope 3 discover the similarities and differences between the two types of cells through careful observation. To study the structure of the onion epidermal cell, with particular emphasis on the nucleus and nucleoli materials: the onion cell lab aim: to observe the difference between onion cells and cheek. How do potato cells differ from onion cells in terms of shape onions were rectangular and long potatoes are circular/penagonal how do potato cells differ from onion cells in terms of structures.