Question

What are Microorganisms ?​

Answer 1

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↣ Microorganisms are living organisms that are very minute to be seen by the naked eye and can be classified into four major groups namely bacteria, fungi, protozoa and some algae.

• ①Virus: You may be surprised to know that the viruses can be crystallized and stored like some non-living things, such as common salt and sugar. On the other hand, they multiply like living organisms when they are within a living body.
• ②Bacteria: Bacteria are single celled microorganisms. They are put under plant kingdom because they have rigid definite cell wall like plant cells. Bacteria can be seen under microscope which enlarges their image from a hundred to thousand times.
• ③Fungi: Fungi are non-green plants. They cannot synthesize their own food. They have to depend for their food on others. Most fungi take their food from dead organic matter. Some live on other organisms as parasites.
• ④Algae: Algae are green substances floating on the surface of a pond, lake, river, stagnant water, moist soil, stones. They tend to grow on wet surfaces. Therefore, they can synthesize their own food. They are found in water or in very moist places.
• ⑤Protozoa: Protozoa are unicellular animals. Some are free-living, others are parasites. Several parasitic protozoans cause diseases in human beings, domestic animals and plants. For example, Plasmodium, a protozoan, causes malaria.

Answer 2

Answer:

• Microorganisms are living organisms that are very minute to be seen by the naked eye and can be classified into four major groups namely bacteria, fungi, protozoa and some algae.

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