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Learn about microorganisms, their types, uses and diseases. Find out how microorganisms are involved in food production, environmental cleaning, medicine and agriculture.
Find detailed answers to exercise questions on microorganisms, their uses, harmful effects and more from NCERT Class 8 textbook. Download free PDF of chapter notes and important questions for easy revision and understanding.
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- Microorganisms: Friend and Foe Class 8 Science Ncert Textbook Questions
- Microorganisms: Friend and Foe Class 8 Science Ncert Intext Activities Solved
- Ncert Solutions For Class 8 Science Chapter 2 – 1 Mark Questions and Answers
- Ncert Solutions For Class 8 Science Chapter 2 – 2 Mark Questions and Answers
- Ncert Solutions For Class 8 Science Chapter 2 – 3 Mark Questions and Answers
- Ncert Solutions For Class 8 Science Chapter 2 – 5 Mark Questions and Answers
- Ncert Solutions For Class 8 Science Chapter 2 Mcqs
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Question 1. Fill in the blanks. (a) Microorganisms can be seen with the help of a _____ (b) Blue-green algae fix ______ directly from the air to enhance the fertility of soil. (c) Alcohol is produced with the help of _____ (d) Cholera is caused by ______ Answer: (a) microscope (b) nitrogen (c) yeast (d) bacteria Question 2. Tick the correct answer....
Activity 1 (NCERT Textbook, Page 17) Collect some moist soil from the field in a beaker and add water to it. After the soil particles have settled down, observe a drop of water from the beaker under a microscope. What do you see? Solution: It is observed that some tiny organisms are moving around. Activity 2 (NCERT Textbook, Page 17) Take a few dro...
Question 1. Name the bacteria responsible for the disease typhoid. [MSE (Chandigarh) 2008] Answer: Salmonella typhi. Question 2. Chicken pox is caused by ………. virus. [KVS 2008] Answer: Varicella zoster. Question 3. ………….. (disease) is caused by mycoplasma. [KVS 2008] Answer: Pleuropneumonia. Question 4. Name the toxin released by T.B. bacteria.[MSE...
Question 1. Describe the role of blue-green algae in fertility of soil. [KVS 2006, MSE (Chandigarh) 2008] Answer: Blue-green, algae, also called cyanobacteria, can fix atmospheric nitrogen into usable , compounds. These are then used as fertilizers. Question 2. Name three habitats of microorganisms. [MSE (Chandigarh) 2008, 2006] Answer: Microorgani...
Question 1. 1. Tuberculosis is a highly infectious disease. Justify the statement. 2. Which vitamin helps in the prevention of common cold ? [MSE (Chandigarh) 2008] Answer: 1. Tuberculosis is a highly infectious disease. TB is transmitted through minute droplets of infected sputum on phelgm, by drinking milk of an infected animal. 2. Common cold is...
Question 1. Describe the nitrogen cycle with the help of a neat and labelled diagram. [MSE (Chandigarh) 2005, 2007] Answer: Question 2. Write 10 lines on the usefulness of microorganisms in our lives. [NCERT] Answer: Microorganisms are useful in our lives in the following ways : 1. Bacteria cause the decay of dead plants and animals. 2. Nitrogen fi...
Question 1. Microorganisms exhibiting the characteristics of living and non-living organisms are known as (a) bacteria (b) virus (c) algae (d) fungi Answer: (b) Question 2. A person bitten by dog gets (a) malaria (b) tetanus (c) typhoid (d) rabies Answer: (d) Question 3. Amoebic dysentery is transmitted by (a) sneezing (b) using contaminated water ...
Learn CBSE provides NCERT solutions for class 8 science chapter 2 microorganisms friend and foe. The solutions include textbook questions, intext activities and summary of the chapter topics and subtopics.
Learn about microorganisms, their types, uses, diseases and preservation with CBSE class 8 science notes. Find out the definitions, examples, videos and FAQs on microorganisms, bacteria, fungi, protozoa, viruses, vaccines, antibiotics and more.
- Microorganisms. There are four major types of microorganisms: Fig 1: Types of Microorganisms. Bacteria: These are single-celled organisms with a rigid cell wall.
- Types of Bacteria (based on their Shapes) and their Examples. Shape of Bacteria. Example. Image. Comma-shaped Bacteria. Fig 3: Vibrio Cholera. Vibrio Cholerae. Spherical-shaped Bacteria (Cocci)
- Where do Microorganisms Live? Microbes can survive in all kinds of environments – from icy cold climates to hot springs (any kind of temperature); and deserts to marshy lands (any humidity level).
- Microorganisms and Us. Some microorganisms are beneficial to us while others are harmful and cause diseases. How are bacteria useful to us? Bacteria are helpful because
Jan 24, 2024 · CBSE Class 8 Science Notes Chapter 2 Microorganisms: Friend and Foe Pdf free download is part of Class 8 Science Notes for Quick Revision. Here we have given NCERT Class 8 Science Notes Chapter 2 Microorganisms: Friend and Foe.
Jun 20, 2024 · Download Microorganisms Friend and Foe Class 8 notes for free and use it to study the chapter well.
