The three types of micro-organism are bacteria, AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt and viruses. Bacteria are AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt celled organisms, found everywhere and reproduce very quickly. Bacteria can cause diseases such as food AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt, tuberculosis, pneumonia, tooth decay and AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt. They are also used to produce AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt, make cheese, AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt and silage. Fungi can be single cells or exist as long AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt such as bread mould. They do not contain AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt. Fungi are useful in AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt, breadmaking, producing antibiotics and some such as AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt are edible. The harmful effects of fungi are that they are poisonous, can cause food to go off and can cause disease such as AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt foot and ringworm. AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt are the smallest type of micro-organism. They cannot reproduce themselves. They act as AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt living inside of other living cells which they kill and take over. Viruses can cause diseases such as AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt, colds, flu, polio, measles mumps and chicken AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt. Antibiotics can not work against viruses but can cure diseases caused by AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt and fungi. AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt is the use of living things such as micro-organisms to make useful substances. In industry, bacteria is used to make AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt and the fungus yeast is used to make alcohol. In medicine, bacteria and fungi produce antibiotics such as AIDSantibioticsathlete'sbacteriaBiotechnologybrewingcheesechlorophyllfungiinsulinmeningitismushroomsparasitespoisoningpoxsinglethreadsVirusesyoghurt and penicillin respectively.