8.3: Lab Report
Exercise A: Colony Characteristics
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Name of Bacterium: |
Typically found where? |
Average colony size (mm): |
Colony Shape: |
Margin: |
Surface: |
Pigmentation (or none) |
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Micrococcus luteus |
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Serratia marcescens |
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Bacillus |
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Escherichia coli |
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Table 8.1 Colony Characteristics
Below, list three ways we benefit from bacteria. You may think of examples from nature, industrial and medical applications, or others. You may reference our lecture material or search the internet (be sure to cite your source).
A.1.
A.2.
A.3.
Exercise B: Investigating Environmental Microbes
B.1. What surfaces will you swab? Examples: you can compare before and after handwashing (don’t dry your hands), or compare two body areas, or environmental samples such as commonly touched areas (phone vs your pencil).
B.2. What is your hypothesis? Get approval before you swab .
B.3. What is your prediction (what will your results look like if your hypothesis is true)?
B.4. After incubation: Sketch and describe your results below.
B.5. Do your results support your hypothesis? Explain:
Exercise C: Viewing Prepared Slide of Gram-Stained "Three Bacterial Types"
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Type: |
Describe the shape and arrangement of cells: |
Sketch at 1000x (oil) |
Gram +/-: |
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bacillus (bacilli) |
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coccus (cocci) |
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spirillum (spirilla) |
Table 8.2 Prepared Slide of Gram-Stained "Three Bacterial Types"
Exercise D
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Bacterium: |
Color of cells (100x lens) |
Gram result (+/-) |
Shape (morphology) |
Sketch in color, 100x lens |
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Micrococcus luteus |
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Serratia marcescens |
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Bacillus |
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Escherichia coli |