Question

Wheat dough if left in the open, after a few days, starts to emit
a foul smell and becomes unfit for use. Give reason.


NCERT Class VIII
Science - Exemplar Problems

Chapter 1. Nuitrion in Plants

Answer 1

Answer:

The dough when left in the open after few days it started emitting a foul smell because due to the action of bacteria and fungi.

Hope it helps you mate....

Answer 2

Answer:

Explanation:You must have observed (i) a white cottony growth on leather articles in humid weather (ii) mushrooms growing rotting wood and (iii) greenish-blue patches on rotting fruits. A cottony growth, developing into coloured patches, is a common occurrence on stale bread. These on organisms belong the saprotrohic mode of nutrition. to the group of fungi and bacteria, and they exhibit the saprotrophic mode of nutrition