Part 1 of Essay
Bacteria can help and harm humans in the world today.The agricultural industry depends on the existence of bacteria that can transform the nitrogen gas from the atmosphere into ammonia in the soil that plants can use in a process called nitrogen fixation.Bacteria are good for recycling because they feed on dying material a ....

Part 2 of Essay
.... many eubacteria are disease causing organisms most are harmless or even beneficial.Most of bacteria found in soil,water,and air are eubacteria.Eubacteria produce many of the antibiotics used in medicine. Bacteria can also be harmful.Some bacteria cause diseases such as Tuberculosis,Gonorrhea,Typhoid fever,Lyme disease,Gangrene,and Endocarditis.Some of these diseases are fatal.Bacteria can also cause skin diseases such as Dermatitis,Leprosy,and Carbuncle.Some bacterial diseases can be contr ....