The following are useful effect of micro-organisms except
- production of vaccines
- curing of tobacco
- tanning of leather
-
decay of meat
The correct answer is: D
Explanation
Decay in meat is not a useful effect of microorganisms. Microorganisms can cause meat to spoil, which can lead to food waste and food borne infections. Spoilage can cause meat to change color, produce off-flavors, and develop mucus and exudates.