Answer: (b) Citrus canker – Bacteria If not, how can they be seen? (a) (i) Female Aedes mosquito (ii) Dengue It is involved in the fixation of nitrogen in leguminous plants (pulses). These questions will test your cognizance, understanding, evaluating and drawing skills. The micro-organism which is capable of converting sugar into alcohol and carbon dioxide is: Answer: This Pdf Help the student who are not able to buy the Book. Name any two antibiotics. Chapter 3 – Synthetic Fibres And Plastics. No. Name two leguminous plants which can fix nitrogen. Genius Teacher is India’s best quiz-based learning app. Visit now and download Free PDFs of solved chapter-wise solutions for Lakhmir Singh and Manjit Kaur … Question 62. Students can download the PDFs easily by clicking the links below: Lakhmir Singh Solutions for Class 8 Science; Lakhmir Singh Chapter Wise Solutions – Download Free PDF. B. So, when all your chapters are crystal clear, scoring higher marks in the examination will become much easier. D. viruses Leguminous plants such as beans and peas can fix nitrogen. (c) by bacteria In this chapter you will study about air pollution and water pollution. The S Chand Class 8 Science Chapter 2 Micro Organisms Friends And Foe Solutions are crafted by subject experts who have vast knowledge over the subject. Here we give Chapter 11 all solution of Class 8. Name the causative micro-organisms of the following animal diseases: D. an alga Female Aedes mosquito acts as carrier of dengue virus. Typhoid and Cholera are caused by bacteria in human beings. (iv) Yeast A vaccine is a special kind of preparation which provides immunity against a particular disease. Describe how, curd is made from milk. Some of the antibodies remain in the body for a long time and protect it from any future attack of disease germs. Answer: D. spider Some micro-organisms decompose the organic matter of dead plants and animals and convert them into simple substances which mix up with the soil. S.Chand’s Science Book-8 B K Gowel. Answer: Microbial diseases that can spread from an infected person to a healthy person through air, water, food or physical contact are called communicable diseases. Which of the two spreads dengue: mosquito or housefly ? How do viruses differ from other micro-organisms such as bacteria? (g)Producing antibiotics The Lakhmir Singh Class 8 Science Solutions for all chapters are provided here so that students can prepare for their examination more effectively. Which of the following is not a communicable disease? We preserve cooked food in the refrigerator at home. (b) Viruses – (I) HIV (II) Tobacco Mosaic virus (TMV) Vaccination protect the children from number of diseases. Question 22. Answer: Dengue disease is caused by a virus. solution. They carry disease-causing micro-organisms (microbes) inside its body. Answer: The organisms which are too small to be seen by the naked eyes and can be seen only though a microscope are called micro-organisms or microbes. Answer: Answer: For any kind of problem regarding understand for any question please comment us. OP Malhotra Differentiation S.Chand ISC Class-12 Maths Solutions Ch-8. So, when all your chapters are crystal clear, scoring higher marks in the examination will become much easier. B and D as these two organisms are able to fix nitrogen gas from atmosphere to enrich soil with nitrogen compounds hence increasing fertility of soil. Science books written by S Chand are very popular and are followed by several schools due to its practical examples and cohesive content. Question 39. (a) Fixing nitrogen The human diseases such as common cold and influenza are caused by viruses. Need assistance? The process of conversion of sugar into alcohol is known as fermentation. Answer: How do micro-organisms help in cleaning the environment? The questions given in S Chand Biology Class 10 are prepared in accordance with CBSE Latest Syllabus, thus holding higher probabilities of appearing on CBSE question papers. B. yeast B. cockroach Answer: C. housefly Name the insect which carries dengue virus. A. cholera S Chand Class 8 Science Chapter 2 Micro Organisms Friends And Foe Solutions are considered an extremely helpful source for exam preparation. (v) A protozoan Preservation by deep freezing means preservation of food material in the extreme cold. What is meant by ‘nitrogen fixation’ ? What is food poisoning? Answer: Publisher: S.Chand & Company Pvt.Ltd. Question 33. Answer: Answer: Micro-organisms are too much smaller that they cannot be seen with naked eye. Yeast – Fungi ; Manjit Kaur has been a school teacher for many years, and she has co-authored various science books. S Chand Class 8 Science Chapter 2 Micro Organisms Friends And Foe Solutions are prepared by SelfStudys experts in a comprehensive manner so that students can read the chapters in a detailed way. Answer: Watch S Chand Science Class 9 Physics(Motion Numericals - Part 1) Solutions| Science Chapter 8 - Physics S Chand - Motion Class 9 Numericals Solutions Part -1 - https://bit.ly/2MKPwVP Cholera, typhoid and tuberculosis are caused by bacteria whereas measles is caused by a virus. Cholera and tuberculosis are examples of communicable diseases. Certain bacteria and blue green algae present in the soil fix atmospheric nitrogen and convert it into compounds of nitrogen. What are the various ways in which communicable diseases can occur and spread? Answer: Question 23. OP Malhotra Triangles Class-9 S.Chand ICSE Maths Ch-8. Diseases cholera and tuberculosis spread by housefly. (ii) Measles They, however, reproduce only inside the cells of the host organism, which may be a bacterium, plant or animal. (ii) a ; It increase the volume of dough. Antibiotics should not be taken unnecessarily. Question 51. D. Kneading A. viruses A. Here you get easy solutions of Lakhmir Singh and Manjit Kaur Science solution Chapter 11 . Hey guys,, How's your studies going on? Which micro-organism is utilized in making curd from milk ? We provide its users access to a profuse supply of questions with their solutions. Question 53. Question 19. Question 80. They are used in the preparation of curd, bread and cake. S Chand Class 8 Science Chapter 2 Micro Organisms Friends And Foe Solutions are prepared by SelfStudys experts in a comprehensive manner so that students can read the chapters in a detailed way. D. yeast (e) meat; fish Chapter 2 – Micro-Organisms: Friends And Foe. Lakhmir Singh and Manjit Kaur Solutions for Class 10 Chemistry - Access free Lakhmir Singh and Manjit Kaur Solutions for Class 10 Chemistry on TopperLearning. Streptomycin and erythromycin are two commonly known antibiotics which are made from fungi and bacteria. Name the micro-organisms present in the soil and in the root nodules of leguminous plants which can fix atmospheric nitrogen. Science is one of the most important subjects in Class 8 CBSE Board examination. Name the scientist who discovered ‘penicillin’. Keep the infected person separated from others & advice him/ her to keep a handkerchief on the nose and mouth while sneezing. Important Keywords. The temperature and pressure during lightning convert atmospheric nitrogen into oxides of nitrogen. The process of converting atmospheric nitrogen into compounds of nitrogen is called nitrogen fixation. There are various ways of preventing the occurrence and spreading of communicable diseases. D. polio I hope you are doing well ! The questions given in S Chand Science Chapter 2 Micro Organisms Friends And Foe Solutions Class 8 are prepared in accordance with CBSE Latest Syllabus, thus holding higher probabilities of appearing on CBSE question papers. C. A and D The process of conversation of sugar into alcohol is known as fermentation. What should an object do to produce sound? Name any two special chemicals which are used as food preservatives. Science & Maths; Class 9. Question 92. Following is the table with the list of chapters that are covered in Lakhmir Singh Solution Class 8 Science: Lakhmir Singh Solutions Class 8 Science: Chapter 1 – Crop Production And Management. Amoeba – Protozoa ; (c) Yellow vein mosaic of bhindi (Okra) What is the name of micro-organisms which reproduce only inside the living … The antibiotics are manufactured by growing specific microorganisms and are used to cure a variety of diseases. Answer: s chand chemistry book for class 11. s chand physics 1 / 12. for class 9 pdfsdocuments2 com. Lakhmir Singh and Manjit Kaur Science solution: Force and Pressure Chapter 11. B. cancer Microorganisms are used for various purposes such as: Question 59. … We should keep our surrounding clean and dry. The solutions covered are easy to understand, and each step by step in the solution is described to match the students’ understanding. Name some of the preservatives which are used in the preservation of fruits as jams arid jellies. Yeast is used for commercial production of alcohol and wine. B. polio Answer: D. Oxygen Question 75. After consuming a dish of mutton, a person complained of nausea, vomiting, diarrhoea, and pain in the abdomen. Which of the following increases the fertility of soil C. protozoa What precautions must be taken while taking antibiotics? Louis Pasteur discovered fermentation in 1857. Distinguish between prokaryotic and eukaryotic cells. Question 37. D. bacteria This is the basis of the use of yeast in the baking industry for making breads, pastries and cakes. Question 4. Meat and fish are preserved by using common salt. (i) Bacteria Not only do these Lakhmir Singh Class 8 Science Chapter 2 Micro Organisms Friends And Foe Solutions strengthen students’ foundation in the subject, but also provide them with the ability to tackle various types of questions easily. Scoring better marks in the examinations is important for CBSE Class 8th students. Give any two examples of micro-organisms. Class 8 Science Lakhmir Singh Book Solution Short Questions, Long Questions, MCQ Questions Solution and discussing. The bread dough rises because of: Question 40. Question 87. (c) Yellow vein mosaic of bindi (Okra) – Virus, Question 95. Question 46 B. A. bacteria C. sodium benzoate Answer: Name the fungus. (e) Common salt has been used to preserve…………. 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