Cottton plug is put on the mouth of test tube to avoid what
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The cotton plug prevents the flow of microorganism on either side of the test tube.
Explanation:
- in addition to this cotton plug also observe a large amount of moisture which is prevented to flow to the microorganism. Also it maintains an aseptic condition
- as a result of this most of the microorganisms are placed in the culture media which are covered with cotton plug. If water vapour is is added to the culture media there will be dilution of the media resulting in an appropriate growth of the bacteria
To know more,
What is the full form of ABN in biology? - Brainly.in
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