Give examples to prove that microbes release gases during metabolism.

Explanation

Bacteria and fungi carry out the process of Fermentation and during this process, they release `CO_(2)`. Fermentation is the process of converting a complex organic substances into a simples substance with the action of bacteria or yeast. Fermentation of sugar produces alcohol with the release of `CO_(2)` and little energy. the dough used for making idli and dosa gives a pubbed appearane due to the release of `CO_(2)`.