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Question

Which one of the following is a laboratory weed?

A
Penicillium
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B
Aspergillus
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C
Neurospora
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D
Saccharomyces
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Solution

The correct option is C Aspergillus
Aspergillus niger is a black mold we find in damp places and this species is largely used in laboratories for the fermentation process.
But it often contaminates the other bacteriological and mycological cultures.
A weed is a plant considered undesirable in a particular situation.
Hence, Aspergillus is also regarded as 'weed of laboratory’. Because it can grow in unwanted places.

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