The first group — the harmless, non-pathogenic microorganisms to man live mostly in the environment. They are called as saprophytic or autotrophic (yeasts, moulds and bacteria) and are very useful to the industries for the manufacturing of alcohol, lactic acid, butter, cheese, solvents of paints and antibiotics etc.
i m snding u the table of the diseases caused by bacterais..
hope it helps!!
typhoid causing bacteria is salmonella
May this will help u
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volcanic atmosphere hypothesis states that the inorganic gases in the atmosphere arises from the explosion of volcanoes. co2 and ch4 are the major gases and the nature was reducing. after that with the reaction of uv with gases releases the free o2 in atmosphere forms the life.
evidences are the remaining fossils of the volcano explosion