Consuming such food can cause a serious illness called food poisoning. D. viruses Name the causative micro-organisms of the following animal diseases: Name any two HIV – Virus, Question 94. The most common carrier of communicable diseases is: Question 51. C. hydrochloric acid This Pasteurized milk can be consumed without boiling as it is free from harmful microbes. Match the micro-organism in column A with their action on Column B: *Science , Mathematics *1.List of All Subjects Covered in RD Sharma Chapter 1 Rational Numbers Chapter 2 Powers Chapter 3 Squares and Square Roots Some of the precautions should be taken while taking antibiotics which are as follows: Question 49. … Blue green algae are known as ‘biological nitrogen-fixer’ as they fix the atmospheric nitrogen. Answer: Answer: C. alcohol Edward Jenner discovered the vaccine for smallpox in 1978. (vi) f ; Blue green algae fix the atmospheric nitrogen to enrich soil with nitrogen and hence, increase soil fertility. When the vaccine containing dead or weakened microbes is introduced into the body of a healthy person, the body fights and kills the microbes by producing some substance called antibodies. Some micro-organisms decompose the organic matter of dead plants and animals and convert them into simple substances which mix up with the soil. They carry disease-causing micro-organisms (microbes) inside its body. Question 25. What is meant by food preservation? Jams and jellies are preserved by using sugar. Answer: The malaria disease is caused by a protozoan called plasmodium. D. female anopheles mosquito Click here to download chemistry Click here to download physics ️ About The Authors ⬅️ Lakhmir Singh has extensive experience teaching science subjects, and has written many books on the three main branches of science - physics, chemistry and biology.He graduated with a Physics (Honours) degree from the Hindu College, and later obtained an M.Sc from Delhi University. Penicillin is an antibiotic made from Penicillium. Name any two communicable diseases. Chapter – 11. Question 80. OP Malhotra Differentiation S.Chand ISC Class-12 Maths Solutions Ch-8. When this contaminated food is consumed by a person, pathogens enter into his body and causes various diseases. (b) What causes this disease? Question 29. Which of the following disease is not caused by bacteria? Lakhmir Singh Science Solutions Class 8 Chapter, Lakhmir singh and manjit kaur OP Malhotra Triangles Class-9 S.Chand ICSE Maths Ch-8 S Chand Class 8 need not be intimidating for you. Hence, one should not let water collect anywhere, in coolers, tyres, flower pot etc. S Chand Science Class 8 Solutions Chapter 18 Pollution of Air and Water Lakhmir Singh Science Class 8 Chapter 18 Very Short Answer Type Questions. Answer: Answer: Student get their Lakhmir Singh Manjit Kaur Class 6 solution by easy step. Which disease is spread by: Food materials such meat and fish are usually preserved by deep freezing. A. measles The S Chand Science Chapter 2 Micro Organisms Friends And Foe Solutions Class 8 is considered as one of the best study tools to prepare for the exam. An antibiotic Penicillin was extracted from fungus (mould) by Alexander Fleming in 1929. To which category of micro-organisms do the following belong? Answer: B and C (g) As a result of nitrogen cycle, the percentage of nitrogen in the atmosphere remains more or less……. Answer: D. protozoan State an important function performed by blue-green algae. Here we give Chapter 11 all solution of Class 8. B. fungus Thus, micro-organisms decompose the harmful and smelly dead remains of plants and animals into harmless materials and thereby clean up the environment. D. Kneading The Lakhmir Singh Class 8 Science Solutions for all chapters are provided here so that students can prepare for their examination more effectively. Board – CBSE. Name two food materials which are preserved by sun-drying method in our homes. D. an alga Answer: Antibiotics should be taken only on the advice of a qualified doctor. Name the instrument (or device) which is needed to see the micro-organisms. Science for Tenth Class Part 2 (Hindi) Chemistry Book-10 Lakhmir Singh. It's All About Science Physics Class 8 R P Rana. Prokaryotic. Answer: State the causative micro-organisms and modes of transmission of the following human diseases : (b) Yellow vein Virus Insect mosaic of bhindi (Okra), a plant disease, is caused by virus. These NCERT Solutions for Class 6 Social Science help you understand concepts, events, etc. The carrier of parasite of malaria is Female Anopheles mosquito. Chlamydomonas – Algae; C. dragonfly S Chand Science Class 8 Solutions is a guide for students to learn important questions from every chapter. A. bacteria Food preservation: Processing of food to prevent their spoilage and to retain their nutritive value for period is called food preservation. C. a fungus We preserve cooked food in the refrigerator at home. Name one disease which spreads through infected food or water. Latest Update: CBSE Class 6 Test your knowledge with interactive quizzes based on your interests. NCERT Solutions for class 9 provide you with a quick way to complete your homework. (vii) penicillium Question 61. Develop your conceptual skills during revision with TopperLearning’s model solutions by expert educators. Timely vaccination against diseases should also be taken. We will help as soon as possible. A. sodium metabisulphate Answer: C. recycling of materials in nature (A) Lactobacillus bacteria In this process, first alcohol is produce by using yeast. This pdf is available for student for free to download. (a) Foot and mouth disease Answer: In this chapter you will study about laws of reflection, regular and diffused reflection, multiple images, kaleidoscope, structure of human eye, braille system, lateral inversion etc. The process of conversion of sugar into alcohol is known as fermentation. D. fungus Answer: Milk contains many microorganisms. Question 77. (a) Alcohol is produced with the help of ………… Question 2. Yeast, a fungus is capable of converting sugar into alcohol and carbon dioxide. Alexander Fleming discovered the antibiotic “Penicillin” in 1929. What is food poisoning? Column B (b) The fruits which are preserved in the form of jams by using sugar as preservative are mango and orange. You will find all the solutions in a detailed manner and without any mistake. Education Franchise × Contact Us. Leguminous plants can fix atmospheric nitrogen into nitrogen compounds. Answer: The human diseases such as common cold and influenza are caused by viruses. Name any two antibiotics. So guy's today I am providing you the pdf file of class 10th p... Hey guys,, How's your studies going on? B. typhoid Chapter 2 – Micro-Organisms: Friends And Foe. These acids are utilized by various organisms. Question 2. Name one animal disease each caused: Question 56. 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. Lakhmir Singh Solutions for CBSE Class 8, 9, 10 for the academic year 2020-21 are provided at BYJU’S. It is involved in the fixation of nitrogen in leguminous plants (pulses). C. protozoan (ii) Measles Answer: Answer: May 21, 2019. The spreading of diseases by mosquitoes can be prevented by following ways: Question 46 A. Question 82. The micro-organism which is capable of converting sugar into alcohol and carbon dioxide is: Answer: Diseases athlete’s food and ring worm are caused by fungi. Housefly is most common carrier of communicable diseases. Today We are providing 9th Class Physics Best Reference Book By S Chand Pdf. (b) Micro-organisms like bacteria and fungi present in the spoilt dish of mutton causes the disease, food poisoning. Subject – Science. There are various ways of preventing the occurrence and spreading of communicable diseases. The dengue disease spread by Aedes mosquito is caused by: Distinguish between prokaryotic and eukaryotic cells. The Lakhmir Singh Science Chapter 2 Micro Organisms Friends And Foe Solutions Class 8 can help you make your concepts strong with the help of questions having a different level of difficulty. What precautions must be taken while taking antibiotics? It's All About Science Physics Class 8 R P Rana. Answer: D. polio And when this housefly sits on uncovered food, they may transfer the pathogens and food gets contaminated. Answer: A. cholera C. bacteria solution, icse-allied publishers Name one disease which spreads by breathing in air containing micro-organisms. D. Oxygen Social Science. Question 3. Question 83. Binding: Paper Back. These are as follows: Question 68 A. Answer: Here you get easy solutions of Lakhmir Singh and Manjit Kaur Science solution Chapter 11 . How do you preserve cooked food at home? Female Aedes mosquito acts as a carrier of dengue virus. Which of the following increases the fertility of soil Class – 6 (Six). The app helps students of CBSE Board Class 7-12 to learn Maths Science, Physics, Chemistry, Biology and English Grammar like never before. OP Malhotra Triangles Class-9 S.Chand ICSE Maths Ch-8. D. increasing the fertility of soil In Chapter 8 of Grade 8 Science, we have to study about few synthetic fibres like Nylon, Rayon or Artificial Silk, Polyester and Acrylic.We should know about the properties of these synthetic fibres. Become our. (d) bacteria We provide its users access to a profuse supply of questions with their solutions. Board – CBSE. D. citric acid Answers, Hints and Solutions have been provided to boost up the morale and increase the confidence level.Self Assessment Sheets have been given at the end of each chapter tohelp the students to assess and evaluate their understanding of the concepts. Important Keywords. 2 Comments. Amoeba – Protozoa ; Name two leguminous plants which can fix nitrogen. Name the micro-organisms which can fix atmospheric nitrogen in the soil. Question 17. Question 19. Name any four diseases which can be prevented by vaccination. C. growth of yeast cells (a) The fruits which are preserved in the form of pickles by using oil and vinegar as preservative are raw mango and lemon. *Science , Mathematics *1.List of All Subjects Covered in RD Sharma Chapter 1 Rational Numbers Chapter 2 Powers Chapter 3 Squares and Square Roots This is the basis of the use of yeast in the baking industry for making breads, pastries and cakes. Diseases cholera and tuberculosis spread by housefly. Which of the following cannot be used as a food preservative? Answer: * RD Sharma Solutions * RS Aggarwal Solutions * S.Chand Solutions Free App In which you can read All 8th class RD Sharma ,S.Chand & RS Aggarwal Solutions with proper diagram and accurate answers. (vii) g, Question 93. The following diseases are caused by the micro-organisms: Question 65. The antibiotics are manufactured by growing specific microorganisms and are used to cure a variety of diseases. Answer: Some bacteria and blue green algae present in the soil and rhizobium present in the root nodules of leguminous plants can fix atmospheric nitrogen. B. Edward jenner What is the name of micro-organisms which reproduce only inside the living … Answer: Answer: Question 90. B. preparation of food by photosynthesis and ………… for ages. Question 44 A. No. Female Anopheles mosquito is a carrier of malarial parasite. B. Edward jenner (e) Causing cholera Name the causative micro-organisms do the following belong? Draw a neat, labelled diagram of nitrogen cycle in nature. Yeast is used in baking industry for making bread. Answer: Board – CBSE. (e) fungi. Rhizobium bacterium is found in the soil. A neat, labelled diagram of the nitrogen cycle in nature is shown below: Question 69. (g) constant. Which of the following disease is not caused by viruses? Louis Pasteur discovered fermentation in 1857. B. protozoan Answer: 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. Answer: Text Book – SCIENCE. Question 18. Answer: This book really help the 9th Class Students in Science Examination. NCERT Solutions of Class 8 Science of Chapter 18 includes solutions of all 11 questions given in … Question 50. B. A. Name the fungus. The houseflies feed on garbage, animal excreta and dead organic matter. Answer: Name the scientist who discovered ‘penicillin’. Answer: Question 84. (a) The plant disease, Rust of wheat is caused by fungi. Question 37. Answer: Name two food materials which can be preserved by using oil or vinegar. The temperature and pressure during lightning convert atmospheric nitrogen into oxides of nitrogen. C. malaria (a) Foot and mouth disease is caused by a virus. Answer: This chapter addresses the solution for these also. The parasite called Plasmodium causes a disease known as malaria. They, however, reproduce only inside the cells of the host organism, which may be a bacterium, plant or animal. from Delhi University. B. virus 400 per month for 20 month in a bank. Language: English. D. Rober coch Some of the antibodies remain in the body for a long time and protect it from any future attack of disease germs. 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Question 73. Yeast is used for the large-scale production of alcohol. Visit now and download Free PDFs of solved chapter-wise solutions for Lakhmir Singh and Manjit Kaur … (a) Fixing nitrogen Answer: Home > School Books > Social Science > S. Chand’s Social Sciences for Class-8 S. Chand’s Social Sciences for Class-8 J C Aggarwal & N.K. Question 55 A. Some bacteria like rhizobium and blue green algae like Nostoc and Anabaena present in the soil are able to fix nitrogen gas from the atmosphere to enrich soil with nitrogen and increase its fertility. Medium – English Medium. These solutions will provide you with an edge over the others because our S Chand Science Chapter 2 Micro Organisms Friends And Foe Solutions Class 8 are concise and to the point. What are the major groups of micro-organisms? (i) Tuberculosis Lactobacillus bacterium is utilized in making curd from milk. (viii) Malaria Question 39. This lactic acid then converts milk into curd. Answer: Protozoa Plasmodium causes malaria disease. Academic Partner. (i) Bacteria (e) Fungi – (I) Penicillium (II) Aspergillus. We should keep our surrounding clean and dry. Class – 8 (Eight). C. housefly A vaccine is a special kind of preparation which provides immunity against a particular disease. The first antibiotic called penicillin was extracted from: (d) algae, and Sodium benzoate and sodium meta bisulphite are common preservatives which are used in the preservation of fruits as jams and jellies. sodium metabisulphate, sodium benzoate and citric acid are used as a food preservative whereas sodium hydroxide is not used as food preservative. Subject: Science . These solutions help students in exams as well as their daily homework. (b) Name (i) mosquito R (ii) protozoan S, and (iii) disease T. All the chapters are divided into clear and concise manner so that it becomes easy for you to understand the concepts and solve the questions. The process of conversion of sugar into alcohol is called: Answer: They are used in the preparation of curd, bread and cake. (D) Blue-green algae Answer: 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. Lakhmir Singh Manjit Kaur Class 8 Science Solution. Vaccination protect the children from number of diseases. They are also used in cleaning up of the environment. Subject – Science. Author Name – Lakhmir Singh Manjit Kaur. Question 48. C. Louis Pasteur The acetobacter bacteria is then added to alcohol. Alcohol can be converted into vinegar by the action of micro-organisms called: (b) Female Aedes mosquito acts as carrier of dengue virus. These solutions will provide you with an edge over the others because our S Chand Science Chapter 12 Friction Solutions Class 8 are concise and to the point. Name any two human diseases caused by bacteria. Antibiotics should not be taken unnecessarily. D. bacteria Class 8 is one of the most important stages in a student’s life. BYJU’S provides Class 8 Science Lakhmir Singh chapter-wise solutions in PDF format to help the students in their exam preparation. How do micro-organisms help in cleaning the environment? Question 62. Medium – English Medium. Question 66 B. Hence, viruses differ from other micro-organisms. Question 1. How does it make the dough rise? They can be seen with a magnifying glass called microscope. C. cholera D. dengue The houseflies feed on garbage, animal excreta and dead organic matter. (c) Yellow vein mosaic of bindi (Okra) Louis Pasteur Discovered fermentation in 1857. Vaccine consists dead and weakened microbes which are harmless and do not cause any disease. (v) A protozoan Question 12. Question 76. SelfStudys presents S Chand Science Chapter 2 Micro Organisms Friends And Foe Solutions Class 8 free pdf download, a smart preparatory guide for students to study questions and answers for their board examinations. Give any two examples of micro-organisms. When cooked food is kept in a cold place, then the food does not get spoiled easily. Answer: The process of conversation of sugar into alcohol is known as fermentation. Question 72. (b) by virus (iii) b; (a) by fungi Answer: HIV causes AIDS disease. All updated in a single page. What is meant by communicable diseases? I hope you are doing well ! Yeast – Fungi ; This Pdf Help the student who are not able to buy the Book. Question 45 B. It increases the volume of dough. (ii) Nitrogen fixation by certain bacteria and blue-green algae: Certain bacteria and blue-green algae present in the soil fix nitrogen from the atmosphere and convert it into compounds of nitrogen. Bacteria and viruses are examples of micro-organisms. 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