Question

explain about the different microbes that cause diseases in human plants and animals in a tabular form?

Answer 1

heya..

cls 8..................

Microorganisms are harmful in many ways. Some of the microorganisms cause diseases in human beings, plants and animals. Such disease-causing

microorganisms are called pathogens. Some microorganisms spoil food, clothing and leather. Let us study more about their harmful activities.Disease— causing Microorganisms in Humans Pathogens enter our body through the air we breathe, the water we drink or
the food we eat.

They can also get transmitted by direct contact with an infected person or carried through an animal. Microbial diseases that can spread from an infected person to a healthy person through air, water, food or physical contact are called communicable diseases. Examples of such diseases include cholera, common cold, chicken pox and tuberculosis. 

When a person suffering from common cold sneezes, fine droplets of moisture carrying thousands of viruses are spread in the air. The virus may enter
the body of a healthy person while breathing.



There are some insects and animals which act as carriers of diseasecausing microbes. Housefly is one such carrier. The flies sit on the garbage and animal excreta. Pathogens stick to their bodies. When these flies sit on uncovered food they may transfer the pathogens.

Whoever eats the contaminated food is likely to get sick. So, it is advisable to always keep food covered Avoid consuming uncovered items of food. Another example of a carrier is the femal Anopheles mosquito 

Disease— causing Microorganisms in Plants

Several microorganisms cause diseases in plants like wheat, rice, potato, sugarcane, orange, apple and others. The diseases reduce the yield of crops. See Table 2.2 for some such plant diseases. They can be controlled by the use of certain chemicals which kill the microbes.

hope helped..