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are the most successful organisms on Earth. The earliest found fossils of date back to 3.5 billion years ago. This makes them the oldest group of organisms. Today can be found in anything, even in the hardest living conditions. can live 1,200 ft. under the ice ....

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.... serious case of causing diseases is tooth decay and ulcers. Tooth decay leads to cavities, which means is arises the film on our teeth. People with diets high in sugar have a higher chance of getting tooth decay or cavities. The sugar us turned into lactic acid, the acid leads to a lost of calcium and if followed by the breaking down of the tooth. Scientists have found that most stomach ulcers are the result of l infection. Many of us once believed that stress was the caused of ulcers. It is possible that the stressful environment helps the ’s growth. Each species of pathogenic has a different way of being transmitted. It can be carried in wat ....