Question

when some wheat dough was felt in the open for a few days, it started emitting a foul smell. state, why?

Answer 1

due to bacteria present around the dough

Answer 2

The wheat dough when left in the open for a few days, starts emitting foul smell due to the action of bacteria and fungi that grow on it. These organisms are called saprotrophs which obtain food from the dead and decaying organic matter.