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प्रश्न
Explain the harmful effects of micro-organisms.
उत्तर
Microorganisms are not always beneficial can lead to various kinds of damage. This damage can be in terms of health of humans and animals, crop production etc. There are various kinds of microorganisms which are known to cause disease in humans and animals.
| Human disease | Pathogen |
| Tuberculosis | Bacteria |
| Measles | Virus |
| Chicken pox | Virus |
| Polio | Virus |
| Cholera | Bacteria |
| Typhoid | Bacteria |
Similarly there are certain species of microorganisms which cause disease in plants and affect the crop productivity.
| Plant disease | Pathogen |
| Citrus canker | Bacteria |
| Rust of wheat | Fungi |
| Yellow vein mosaic of bhindi (okra) | Virus |
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संबंधित प्रश्न
Cholera is caused by _________.
Citrus canker is transmitted by insects.
What are pathogens?
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The two micro-organisms which live in symbiotic association in lichens are
The disease caused by a protozoan and spread by an insect is ______.
Suggest a suitable word for the following statement.
Chemicals which kill or stop the growth of pathogens.
Name two diseases that are caused by virus.
Write one important characteristic of virus.
Define the following:
Toxin
