8. Write a short paragraph on the harmful effects of microorganisms.
Microbes enter the human body via food, water, air, or by the help of carriers. There are harmful effects of microorganisms which 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.