During this process, lactobacillus bacterium acts on lactose sugar present in milk and converts it into lactic acid. (a) (i) Female Aedes mosquito (ii) Dengue Question 27. The two ways in which in which nitrogen gas of the atmosphere can be ‘fixed’ in nature to get nitrogen compounds in the soil are: (i) Nitrogen fixation by lightning: Lightning also helps in fixing atmospheric nitrogen into the soil. We will help as soon as possible. (b) Anthrax disease is caused by a bacterium. Name the causative micro-organisms of the following animal diseases: Chapter 3 – Synthetic Fibres And Plastics. B. cancer (b) (i) Female Anopheles mosquito (ii) Plasmodium (iii) Malaria Answer. (iii) Chickenpox Some of the advantages given here are as follows: Lakhmir Singh has vast experience teaching science subjects and has written many books and solutions on the three main branches of science such as Physics, Biology and chemistry. 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. A. virus Lakhmir Singh Manjit Kaur Class 6 Science Solution. C. sodium benzoate Answer: Name any two communicable diseases. Name any two diseases spread by housefly. Board – CBSE. (vi) f ; Streptomycin, tetracycline and erythromycin are some of the commonly known antibiotics which are made from fungi and bacteria. NCERT Solutions of Class 8 Science of Chapter 18 includes solutions of all 11 questions given in … What are the various ways in which communicable diseases can occur and spread? B. fungus May 21, 2019. park.. Question 22. Describe the method of pasteurization for the preservation of milk. When this contaminated food is consumed by a person, pathogens enter into his body and causes various diseases. B. preparation of food by photosynthesis The bread dough rises because of: Which of the following cannot be used as a food preservative? Answer: 1 Chapter Wise Class 8 Science NCERT Solutions for 2020-2021; 2 NCERT Solutions for Class 8 Science All Chapters; 3 CBSE Class 8 Science Solutions updated for 2020-2021; 4 Class 8 Science Important Questions for 2020-21; 5 Class 8 Science Multiple Choice Questions (MCQ ) 2020-21; 6 Class 8 Science Solutions and Main Points for NCERT Books. D. viruses It is involved in the fixation of nitrogen in leguminous plants (pulses). Name any two Medicines which kill or stop the growth of the disease-causing micro-organisms are called antibiotics. What is meant by ‘nitrogen fixation’ ? Question 80. Question 8. C. tuberculosis Hence, viruses differ from other micro-organisms. A vaccine is a special kind of preparation which provides immunity against a particular disease. Question 17. (i) e; D. bacteria These nitrogen compounds combine with rain water to form nitric and nitrous acid which mix with the soil. (a) by fungi They, however, reproduce only inside the cells of the host organism, which may be a bacterium, plant or animal. Answer: Answer: Which natural phenomenon occurring in the sky is responsible for nitrogen fixation? Preservation by deep freezing means preservation of food material in the extreme cold. The Solutions are based on the latest CBSE syllabus pattern. It is finally stored at low temperature. B. fungi Milk contains many microorganisms. Latest Update: CBSE Class 6 Test your knowledge with interactive quizzes based on your interests. Eukaryotic. Where do Rhizobium bacteria live? (ii) rhizobium Name one plant disease each caused: Question 1. Question 60. Answer: Mr. Rajiv Anand has opened a recurring deposit account of Rs. State the beneficial effects (or usefulness) of micro-organisms in our lives. Answer: D. protozoan Practice Questions. The parasite called Plasmodium causes a disease known as malaria. Leguminous plants can fix atmospheric nitrogen into nitrogen compounds. Question 4. Here you get easy solutions of Lakhmir Singh and Manjit Kaur Science solution Chapter 11 . They are also used in cleaning up of the environment. (viii) Malaria (b) Anthrax A. cholera (c) Yellow vein mosaic of bindi (Okra) I hope you are doing well ! Answer: A. bacteria (b) setting of curd These solutions help students in exams as well as their daily homework. of Pages: 352. Sodium benzoate and sodium metabisulphite are common preservatives. Spray insecticides and control breeding of mosquitoes by not allowing water to collect in the surroundings. Question 18. Which of the following is an antibiotic? Answer: OP Malhotra Triangles Class-9 S.Chand ICSE Maths Ch-8 Question 47 A. Some of the antibodies remain in the body for a long time and protect it from any future attack of disease germs. s chand class xii physics s chand flipkart com. Answer: Certain bacteria and blue green algae present in the soil fix atmospheric nitrogen and convert it into compounds of nitrogen. These micro-organisms are commonly called biological nitrogen fixers. sodium metabisulphate, sodium benzoate and citric acid are used as a food preservative whereas sodium hydroxide is not used as food preservative. Answer: Answer: Chapter 3: Synthetic Fibres and Plastics. How do mosquitoes carry disease-causing micro-organisms and spread diseases? We should keep our surrounding clean and dry. A. a bacterium Column A and ………… for ages. Name the gas present in atmosphere which is mainly responsible for causing global warming. The spreading of diseases by houseflies can be prevented by following ways: Question 45 A. Question 87. Free PDF download of Lakhmir Singh Science Solutions Class 8 Chapter 2 Micro-Organisms: Friends and Foe solved by Expert Teachers as per NCERT (CBSE) Book guidelines. Food materials such meat and fish are usually preserved by deep freezing. What is food poisoning? Net Explanations. Answer: Name some of the preservatives which are used in the preservation of fruits as jams arid jellies. *Science , Mathematics *1.List of All Subjects Covered in RD Sharma Chapter 1 Rational Numbers Chapter 2 Powers Chapter 3 Squares and Square Roots Develop your conceptual skills during revision with TopperLearning’s model solutions by expert educators. These acids are utilized by various organisms. Why are children given vaccination ? S.Chand’s ICSE Mathematics Solution; ML Aggarwal Solution; RD Sharma Math Solution; Science Diagrams; New Learning Composite Mathematics SK Gupta Anubhuti Gangal Solution ; Lakhmir Singh Manjit Kaur Class 8 Science 11th Chapter Force and Pressure. Name any two animal diseases and two plant diseases caused by micro-organisms. For Study plan details. Question 55 A. (d) Cholera is caused by………….. C. bacterium Answer: (a) female Anopheles mosquito? Thus, micro-organisms decompose the harmful and smelly dead remains of plants and animals into harmless materials and thereby clean up the environment. Streptomycin and erythromycin are two commonly known antibiotics which are made from fungi and bacteria. This book really help the 9th Class Students in Science Examination. They are used in the preparation of alcohol, wine and acetic acid (vinegar). We Provide Step by Step Answer of Exe-8(a), Exe-8(b), Exe-8(c), with Chapter Test of S Chand OP Malhotra Maths . A. heat They just reproduce. B. alcohol. C. a fungus Question 61. When this infected mosquito bites a healthy person, it transfers the microbes into his blood stream, hence the healthy person also gets malarial disease. B. Typhoid and Cholera are caused by bacteria in human beings. Answer: And the working mechanism of the antibiotics is to break the cell wall and attack on the bacteria. They are used in the preparation of curd, bread and cake. How do micro-organisms help in cleaning the environment? In this process, milk is heated to about 70oC for 15 to 30 seconds to kill bacteria. Which of the following disease is not caused by viruses? Tuberculosis disease spreads by breathing in air containing micro-organisms. Which of the following disease is not caused by bacteria? This makes the dough rise. The mosquito P is a carrier of virus and spreads a disease Question Another mosquito R is the carrier of protozoan S and spreads s disease called T. The solutions covered are easy to understand, and each step by step in the solution is described to match the students’ understanding. Answer: Question 64. A. sugar Which of the following is not a use of micro-organisms? Acetobacter bacteria convert alcohol into acetic acid (or vinegar). After consuming a dish of mutton, a person complained of nausea, vomiting, diarrhoea, and pain in the abdomen. 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. Female Anopheles mosquito is a carrier of malarial parasite. (a) Bacteria – (I) Lactobacillus bacteria (II) Rhizobium bacteria (c) Protozoa – (I) Amoeba (II) Paramecium Science for Tenth Class Part 2 (Hindi) Chemistry Book-10 Lakhmir Singh. (iii) Lactobacillus Name the causative micro-organisms do the following belong? Answer: You can find the complete syllabus in the solutions developed by the Selfstudys. Here are some reasons why it would be helpful: The Lakhmir Singh Class 8 Science Chapter 2 Micro Organisms Friends And Foe Solutions offers various advantages to students who are appearing for the examination. Why are antibiotics not effective against ‘common cold’ and ‘flu’? (b) Citrus canker Answer: Name two food materials which are preserved by sun-drying method in our homes. C. malaria The two common insects which act as carriers of disease-causing micro-organisms (or disease-causing microbes) are housefly and mosquito. Microorganisms are used for various purposes such as: Question 59. They, however, reproduce only inside the cells of the host organism, which may be a bacterium, plant or animal. Contact us on below numbers. Question 39. What is the full form of HIV? The communicable diseases can occur and spread in the following ways: Question 67 A. Name the insect which is the carrier of parasite of malaria. A. measles Answer: Name two food materials which can be preserved by using sugar. Hey guys,, How's your studies going on? Question 10. Answer: The human diseases amoebic dysentery and malaria are caused by protozoans. Question 3. Answer: A neat, labelled diagram of the nitrogen cycle in nature is shown below: Question 75. Question 1. Name any four diseases which can be prevented by vaccination. B. fungus (c) Micro-organisms can be seen with help of a………. (e) fungi. (ii) Measles Answer: Question 32. (A) Lactobacillus bacteria (a) Foot and mouth disease State an important function performed by blue-green algae. (f) The food material which is preserved by pasteurization is …………….. 400 per month for 20 month in a bank. Answer: Microscope is needed to see the micro-organisms. Lactobacillus bacterium is utilized in making curd from milk. solution. What is their function? About the Lakhmir Singh Class 8 Science Solutions Authors. Match the micro-organism in column A with their action on Column B: Question 42. Answer: Question 1. D. Oxygen 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. Diseases athlete’s food and ring worm are caused by fungi. Fish and meat are often preserved by using oil or vinegar. State the various ways of preventing the occurrence and spreading of communicable diseases. Carbon dioxide traps heat and does not allow … Which of the two spreads dengue: mosquito or housefly ? (b) Micro-organisms like bacteria and fungi present in the spoilt dish of mutton causes the disease, food poisoning. Certain microbes are also used in the biological treatment of sewage and industrial effluents. A. bacterium Name any two antibiotics. Question 44 A. (c) Female Female Aedes mosquito carries dengue virus. D. viruses B. Edward jenner Class 8, Lakhmir Singh. I hope you are doing well ! Question 34. D. measles Fill in the following blanks with suitable words: 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. Name the insect which carries dengue virus. (d) algae, and The following diseases are caused by the micro-organisms: Question 65. Viruses are too much smaller in comparison to other micro-organisms. Answer: C. chickenpox Class – 6 (Six). Name some of the preservatives which are used in the preservation of fruits and vegetables as pickles. 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. (vii) penicillium Name the instrument (or device) which is needed to see the micro-organisms. What is meant by food preservation? Subject – Science. Question 77. Micro-organisms are too much smaller that they cannot be seen with naked eye. Class – 8 (Eight). ICSE - goyal brothers About the book. Contact. How does Air Get Polluted are some of the significant topics discussed in this chapter. Answer: Answer: D. infection Question 31. Leguminous plants such as beans and peas can fix nitrogen. (d) bacteria Answer: Its help you to complete your homework. B and C B. cockroach Lakhmir Singh Science Class 8 Solutions: Lakhmir Singh and Manjit Kaur Science Class 8 Solutions free pdf download are available here.S Chand Science Class 8 Solutions are series of books which conforms to the NCERT syllabus. Answer: Class 8 Science Lakhmir Singh Book Solution Short Questions, Long Questions, MCQ Questions Solution and discussing. D. Kneading And the viruses do not have cells but live in the cells of living beings. Question 36. Answer: Question 20. Question 45 B. Academic Partner. (vi) A virus These substances are again used by other plants and animals. Next it is chilled very fast to prevent bacteria from growing. Which of the following is not a communicable disease? C. bacteria It's All About Science Physics Class 8 R P Rana. 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. Lactobacillus – Bacteria ; Question 26. These make the food unfit for consumption. C. hydrochloric acid Name the micro-organisms present in the soil and in the root nodules of leguminous plants which can fix atmospheric nitrogen. Several diseases including tuberculosis, smallpox, cholera and hepatitis can be prevented by vaccination. Answer: Subject – Science. Medium – English Medium. Also name the causative micro-organisms and mode of transmission for each of these diseases. Chlamydomonas – Algae; They do not show most of the characteristics of the living organisms like respiration. B. Edward jenner Meat and fish are preserved by using common salt. Dengue disease is caused by a virus. Some of the precautions should be taken while taking antibiotics which are as follows: Question 49. Microorganisms such bacteria and fungi that grow on our food items sometimes produce toxic substances. Name two food materials which can be preserved by using oil or vinegar. Genius Teacher is India’s best quiz-based learning app. Answer: Yeast is used in baking industry for making bread. How do houseflies carry disease-causing microbes-(or pathogens)? (e) Causing cholera s chand chemistry book for class 11. s chand physics 1 / 12. for class 9 pdfsdocuments2 com. Question 79. Science for Tenth Class Part 1 (Hindi) Physics Book-10 Lakhmir Singh. Answer: (b) The fruits which are preserved in the form of jams by using sugar as preservative are mango and orange. (vii) Hepatitis B (b) Female Aedes mosquito acts as carrier of dengue virus. In agriculture, they are used to increase soil fertility by fixing nitrogen. BYJU’S provides Class 8 Science Lakhmir Singh chapter-wise solutions in PDF format to help the students in their exam preparation. When cooked food is kept in a cold place, then the food does not get spoiled easily. D. citric acid solution, icse-allied publishers (g) As a result of nitrogen cycle, the percentage of nitrogen in the atmosphere remains more or less……. Question 46 B. Food hygiene is essential for preventing food poisoning. Answer: (B) Rhizobium bacteria Name the -micro-organism which is used for the large scale production of alcohol. Question 12. (e) meat; fish Edward Jenner discovered the vaccine for smallpox in 1978. Name two food materials which are usually preserved by deep freezing. S Chand Class 8 Science Chapter 2 Micro Organisms Friends And Foe Solutions are considered an extremely helpful source for exam preparation. Answer: Answer: Answer: Class 8 Maths Chapter 2 Linear Equations in One Variable Exercise 2.1 Questions with Solutions to help you to revise complete Syllabus and Score More marks. (b) viruses Lightning is a natural phenomenon which occurs in the sky and responsible for nitrogen fixation. Some micro-organisms decompose the organic matter of dead plants and animals and convert them into simple substances which mix up with the soil. Question 38. Viruses are the smallest micro-organisms which reproduce only inside the living cells of other organisms. 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. Binding: Paper Back. Free PDF download of NCERT Solutions for Class 8 Maths Chapter 2 Exercise 2.1 (EX 2.1) and all chapter exercises at one place prepared by expert teacher as per NCERT (CBSE) books guidelines. Low temperature inhibits the growth of micro-organisms. Answer: Describe how, curd is made from milk. Louis Pasteur discovered fermentation in 1857. Cholera disease spreads through infected food or water. (d) Causing malaria Question 73. 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. NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. Important Keywords. No. They do not show most of the characteristics of the living organisms like respiration. Maintain personal hygiene and good sanitary habits. Answer: Answer: D. fungus All the questions has been solved by experts and explained in detail. Alexander Fleming discovered the antibiotic “Penicillin” in 1929. Why should we not let water collect anywhere in the neighbourhood? C. fermentation NCERT text book questions and answers help you to get thorough understanding of the concepts. When yeast is mixed in dough for making bread, the yeast reproduces rapidly and produces carbon dioxide during respiration. Question 13. Question 23. Question 90. Viruses differ from other micro-organisms because they are too much smaller in comparison to other micro-organisms. This pdf is available for student for free to download. The most common carrier of communicable diseases is: Question 85. Answer: D. B and D Question 19. C. malaria Question 25. Advertisement. Blue green algae are known as ‘biological nitrogen-fixer’ as they fix the atmospheric nitrogen. The antibiotics are manufactured by growing specific microorganisms and are used to cure a variety of diseases. Question 76. (c) Citrus canker is caused by bacteria. D. yeast (c) by bacteria It lives in the root nodules of leguminous plants such as beans and peas, with which it has a symbiotic relationship. Answer: (D) Blue-green algae Subject: Science . Answer: (c) microscope (b) in the form of jams. OP Malhotra Triangles Class-9 S.Chand ICSE Maths Ch-8. Organisms … Name the microbe which causes malaria disease. Question 33. from Miranda House, Delhi and also obtained a B.Ed. Medium – English Medium. The main aim of writing science solutions for class 8 to help students understand … Answer: Can micro-organisms be seen with the naked eye? (f) Causing AIDS (b) Name (i) mosquito R (ii) protozoan S, and (iii) disease T. They carry disease-causing micro-organisms (microbes) inside its body. Answer: Education Franchise × Contact Us. Question 63. The S Chand Class 8 Science Solutions chapter-wise is given below. best reference books for class 11 cbse vagupu com. The temperature and pressure during lightning convert atmospheric nitrogen into oxides of nitrogen. State any two ways of preventing diseases spread by houseflies. 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. Answer: Here we give Chapter 11 all solution of Class 8. Question 70. Question 9. Question 15. S Chand ICSE Solutions for Class 10 Maths Banking Exercise 2: Ques No 1. D. dengue Lakhmir Singh and Manjit Kaur Science solution: Force and Pressure Chapter 11. Cholera, chickenpox and malaria are communicable disease while cancer is not a communicable disease. Class 9 - Maths+Science; Class 9 - Science; Class 9 - Mathematics; Class 9 - Science+Maths Video Paper Solutions; Class 10. Bubbles of the gas fill the dough and increase its volume. We provide its users access to a profuse supply of questions with their solutions. What is meant by fermentation? Chowdhry. Mention any three ways of preventing diseases spread by mosquitoes. (b) Citrus canker 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. Question 84. Lakhmir Singh and Manjit Kaur class 8 science textbook solutions hold a high regard among students of CBSE Class 8 students. The human diseases such as common cold and influenza are caused by viruses. ISBN-13: 9789352530243. D. an alga (a) in the form of pickles A. cholera 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. The micro-organisms which can reproduce and multiply only cells of other organisms are: Answer: (c) protozoa (v) d ; Jams and jellies are preserved by using sugar. C. housefly Lakhmir Singh Manjit Kaur Class 8 Science Solution. (vi) Typhoid Which disease is spread by: There are various ways of preventing the occurrence and spreading of communicable diseases. C. protozoa S Chand ICSE Maths Solutions for Class 10 Chapter 4 Linear Inequations in One Variables. Yeast is used for commercial production of alcohol and wine. Question 89. (vii) g, Question 93. Alcohol can be converted into vinegar by the action of micro-organisms called: (a) Name (i) mosquito P, and (ii) disease Question So guy's today I am providing you the pdf file of class 10th physics S chand book. So, when all your chapters are crystal clear, scoring higher marks in the examination will become much easier. Name an antibiotic extracted from fungus (mould). Name the instrument (or device) which is needed to see the micro-organisms. Question 28. Manjit Kaur has been a school teacher for many years, and she has co-authored various science books. 1 / 12. for Class 9 provide you with a physics ( )! Antibiotics should be taken only on the latest CBSE syllabus pattern by bacteria mainly responsible causing! Icse-Allied publishers solution: Question 54 b important questions from every Chapter is by. For any Question please comment us labelled diagram of nitrogen in the biological treatment of sewage industrial! 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