8. Write a short paragraph on the harmful effects of microorganisms.
The harmful effects of microorganisms are given below-
Microorganisms cause diseases in animals. For example : in humans bacteria cause diseases such as tubercolosis , cholera , typhoid , etc. In cattle , the foot and mouth disease is caused by a virus . Also several microbes cause diseases in plants. For example:citrus canker in plants which is caused by bacteria and also rust of wheat which is caused by fungi. Food poisoning is also vaused by microorganisms.