Toppers Study Toppers Study Toppers StudyGet complete NCERT Solutions for 8 Science 2. Microorganisms : Friend And Foe with detailed explanations. Easy-to-understand answers to help students study effectively and score better.
Get complete NCERT Solutions for 8 Science 2. Microorganisms : Friend And Foe with detailed explanations. Easy-to-understand answers to help students study effectively and score better.
Preparing for exams becomes easier with Additional Questions With Solutions. Whether you are studying for board exams or mid-term exams, 8 Science Chapter 2. Microorganisms : Friend And Foe solutions provide quick revising points, well-structured answers, and additional practice material to help you score better.
ncert_solutionsQ1: What are the major groups of microorganisms?
Ans: (i) Bacteria (ii) Fungi (iii) Protozoa (iv) algae
Q2: What are viruses?
Ans: Viruses are also microscopic. But they reproduce only inside the cells of the host organism, which may be bacteria, plant and animals etc. common cold influenza and cough are caused by viruses.
Q3: Name three diseases caused by virus.
Ans: Polio, chicken pox and measles.
Q4: Name three water born diseases.
Ans: Hepatitis, typhoid, cholera etc.
Q5: How do microorganisms help us.
OR
Write the uses of microorganisms for various purposes.
Ans: The uses of microorganisms:-
(i) They are used in the preparation of curd, bread and cake.
(ii) They are also used in cleaning up of the environment.
(iii) They are used in the preparation of medicines.
(iv) They are used to increase soil fertility by fixing nitrogen.
Q6: Name the microorganism which is found in curd.
Ans: Lactobacillus bacteria.
Q7: Name the bacteria which promote the formation of curd.
Ans: Lactobacillus.
Q8: What is fermentation?
Ans: The process of conversion of sugar of fruits juice into alcohol is known as fermentation.
Q9: Name the gas produced by yeast during the process of fermentation.
Ans: Carbon dioxide.
Q10: Name the microorganism which is used for large scale production of alcohol.
Ans: Yeast.
Q11: What is food poisoning? What is its disadvantages.
Ans: Food poisoning could be due to the consumption of food spoilt by some microorganisms. Microorganisms that grow on our food sometimes produce toxic substances. These make the food poisonous causing serious illness and even death.
Q12: What are antibiotics?
Ans: The medicines which kill or stop the growth of the disease causing bacteria such medicines are called antibiotics. Ex . streptomycin, penicillin and erythromycin etc.
Q13: Name two antibiotics.
Ans:
(i) Streptomycin.
(ii) Penicillin
Additional Questions With Solutions are created by experts to give step-by-step explanations. Around 60–70% of exam questions are based on NCERT concepts. Our 8 Science Chapter 2. Microorganisms : Friend And Foe solutions help you understand the core concepts and practice effectively.
Revision is the key to exam success. Our notes for 8 Science highlight important formulas, key definitions, and exam-ready points from Chapter 2. Microorganisms : Friend And Foe. These quick revision notes make last-minute preparation easy.
Every NCERT chapter ends with exercises, and solving them is crucial. Our Additional Questions With Solutions include complete solutions for 8 Science Chapter 2. Microorganisms : Friend And Foe exercises. With step-by-step answers, you gain clarity and confidence to attempt similar exam questions.
To boost your preparation, we also provide additional important questions with answers. These are prepared from previous year board papers, sample papers, and important concepts of Chapter 2. Microorganisms : Friend And Foe. Practicing these ensures you are well-prepared for both board and mid-term exams.
Our Additional Questions With Solutions are useful for both board exams and mid-term exams. For 8 Science, we provide notes, exercises, and important Q&A so that you can revise smartly and write perfect answers in exams.
In short, Additional Questions With Solutions for 8 Science Chapter 2. Microorganisms : Friend And Foe are a complete study package. With quick revising points, NCERT exercises, and additional important questions, you can prepare effectively for exams. Make these solutions your study companion and excel in your academic journey.
Go to other Class
Download worksheets and assignments for better practice and revision.