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प्रश्न
What are micro-organisms?
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उत्तर १
There are countless -living organisms on the earth. Of these, the organisms which cannot be seen with our eyes but can only be observed under a microscope are called micro-organisms.
उत्तर २
Living organisms which are not visible to the naked eye are known as micro-organisms. They are living organisms that can be seen only with a microscope or a magnifying glass. Microorganisms were observed for the first time by Anton von Leeuwenhoek in 1674, using a microscope of his own.
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| Column A | Column B |
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| (d) Alexander Fleming | (iv) Small pox vaccine |
| (v) Typhoid |
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