A dye absorbed by the cells themselves, making them stand out from the background, is a:
APositive stain
BPassive stain
CNegative stain
DNeutral stain
Answer & Solution
Correct answer: A. Positive stain
1. The cells take up the colour.
2. The background stays clear.
3. It is a positive stain.
_Source: OpenStax Microbiology, Chapter 2, How We See the Invisible World._
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