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Introduction to Microorganisms Video Lecture - Class 8

FAQs on Introduction to Microorganisms Video Lecture - Class 8

1. What are microorganisms?

Ans. Microorganisms are tiny living organisms that cannot be seen with the naked eye. They include bacteria, viruses, fungi, and protozoa. They are found almost everywhere, including the air, water, soil, and inside the bodies of plants, animals, and humans.

2. How do microorganisms affect our health?

Ans. Microorganisms can have both positive and negative effects on our health. Some microorganisms, like certain bacteria in our gut, help in digestion and the production of vitamins. However, some microorganisms can cause diseases, such as bacteria causing infections or viruses causing the flu.

3. How do microorganisms play a role in the environment?

Ans. Microorganisms play a crucial role in the environment. They help in the decomposition of dead organisms, recycling nutrients back into the ecosystem. They also contribute to the nitrogen cycle, converting nitrogen gas into a form that plants can use. Additionally, some microorganisms are involved in the production of oxygen through photosynthesis.

4. Can microorganisms be beneficial in agriculture?

Ans. Yes, microorganisms can be beneficial in agriculture. Certain bacteria and fungi form a symbiotic relationship with plant roots, known as mycorrhizae and rhizobia, respectively. These microorganisms help in nutrient absorption, improve soil structure, and enhance plant growth. They are also used in the production of biofertilizers and biopesticides.

5. How do microorganisms help in food production?

Ans. Microorganisms play a vital role in food production. They are used in processes such as fermentation, where bacteria or yeast convert sugars into alcohol or acids, producing foods like bread, cheese, yogurt, and pickles. Microorganisms are also used in the production of enzymes used in food processing and in the preservation of foods through techniques like canning and pasteurization.

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