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Dangerous Ideas and Forbidden Knowledge, Spring 2005 Lab 1 Worksheet Name: ___________________ Microscopy, Cells, and Micropipettes 1. If you are observing a sample using your 10X objective lens, the total magnification of the image you observe is ________X. 2. Draw a single, isolated cheek cell (at high power) in the space at right. As you’ll do with any biological drawing, include the name of the organism, magnification, color, a description of the shape, and a description of any structrues that you can see inside the cells. Specimen: ____________________ Total Magnification: ____________ Description: ___________________ ______________________________ 3. Draw a portion of the Elodea leaf you observed (at high power) in the space at right. As you did above, be sure to identify your specimen, note your total magnification, and describe and label any structures you can identify within the cells. Specimen: ____________________ Total Magnification: ____________ Description: ___________________ ______________________________ 4. Compare and contrast the structure of the animal and plant cells. What do you notice that they have in common? In what ways are they different? 5. How large are the bacteria cells compared to the other cells you have observed today? Keep in mind that you have observed these cells at 1000X, and the others at 100X or 400X. Do they appear to have anything in common with plant and animal cells? How are they different? 1 Dangerous Ideas and Forbidden Knowledge, Spring 2005 6. In the space at right, draw one organism you found in the pond water sample, including labels and descriptions, as always. Specimen: ____________________ Total Magnification: ____________ Description: ___________________ ______________________________ Do you think the organism you selected is most likely a plant, animal, bacteria, or something else? Briefly explain your reasoning. 2