2 years ago

At the start of the lab, you will test known samples in order to see what positive and negative test results look

1 answer:

8 0

Answer:

I feel it's to easily differentiate the positive from the negative...... like in gram staining of bacteria, the colour tell us which bacteria is gram positive or gram negative...... I just feel that this is science and it is advisable to know what the opposite result of an experiment should look like.

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