Answers

2016-04-25T18:03:20+05:30
The increasing number of microorganism lead this change
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2016-04-25T18:07:53+05:30
Curd is made out of a bacteria called Lactobacillus curd is made by adding warm milk .becaus eof thic bacteriacurd becomes sour if it is not tranferred to a cold place after it is set. 
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