Editing 1151: Tests
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==Explanation== | ==Explanation== | ||
| β | The first present [[Megan]] opened contained a home biology lab kit, including the equipment needed to perform a Gram stain. {{w|Gram staining}} is a technique used in microbiology to separate bacteria into two broad categories based on the structure of their cell walls. The sample is treated with two different dyes: first a purple dye, then secondly a pink one. When subsequently examined under a microscope, "Gram-positive" bacteria retain the purple color of the first dye, whereas "Gram-negative" bacteria do not, allowing the second pink stain to show. All Megan's presents have been stained pink, and are presumably therefore Gram-negative. | + | The first present [[Megan]] opened contained a home biology lab kit, including the equipment needed to perform a Gram stain. {{w|Gram staining}} is a technique used in microbiology to separate bacteria into two broad categories based on the structure of their cell walls. The sample is treated with two different dyes: first a purple dye, then secondly a pink one. When subsequently examined under a microscope, "Gram-positive" bacteria retain the purple color of the first dye, whereas "Gram-negative" bacteria do not, allowing the second, pink, stain to show. All Megan's presents have been stained pink, and are presumably therefore Gram-negative. |
In the process, she has damaged the other presents, hence Cueball's wish that she had opened another present first. | In the process, she has damaged the other presents, hence Cueball's wish that she had opened another present first. | ||
