if a piece of bread is placed under a bell jar it gets mould.how did the mould get inside the jar? 

Dear student,   
Please find below the solution to the asked query   

When kept inside the jar, the piece of bread develops a mould on it. The spores of bread mould get inside the jar whenever the bread is exposed to air. These spores germinate and form bread mould. However, in an air-tight jar, the growth of mould is slower as compared to the bread kept in open.

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  • 6
mould is formed due to the acrion of micro-organism i.e fungi 
 
  • -3
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