Answer: 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. Science for Tenth class physics S chand book pdf download July 01, 2020. S. Chand's Science for Class - 8 book. Thus, micro-organisms decompose the harmful and smelly dead remains of plants and animals into harmless materials and thereby clean up the environment. The micro-organisms which can reproduce and multiply only cells of other organisms are: We provide its users access to a profuse supply of questions with their solutions. Question 38. Answer: C. A and D The two common insects which act as carriers of disease-causing micro-organisms (or disease-causing microbes) are housefly and mosquito. Name the scientist who discovered ‘penicillin’. B. housefly 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. The main aim of writing this series is to help the learners understand difficult scientific concepts in a simple manner in easy language. D. B and D The process of converting atmospheric nitrogen into compounds of nitrogen is called nitrogen fixation. Answer: (d) bacteria Describe how, curd is made from milk. Answer: 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. Its help you to complete your homework. In agriculture, they are used to increase soil fertility by fixing nitrogen. Yeast is used for the large-scale production of alcohol. Answer: HIV causes AIDS disease. Answer: Name the instrument (or device) which is needed to see the micro-organisms. (c) What is the sex of mosquito P? So, when all your chapters are crystal clear, scoring higher marks in the examination will become much easier. Question 14. What type of plants can fix nitrogen gas of the air into compounds of nitrogen? Microscope is needed to see the micro-organisms. These micro-organisms are commonly called biological nitrogen fixers. Answer: Question 12. Name the micro-organisms which can fix atmospheric nitrogen in the soil. Genius Teacher is India’s best quiz-based learning app. Here we give Chapter 11 all solution of Class 8. Degree from Delhi University. (iii) Lactobacillus Name any two human diseases caused by viruses. * 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. D. B and D Author Name – Lakhmir Singh Manjit Kaur. Name any two communicable diseases. A. sugar They carry disease-causing micro-organisms (microbes) inside its body. 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. C. fermentation The human diseases amoebic dysentery and malaria are caused by protozoans. Answer: Amoeba, Lactobacillus, Chlamydomonas, Penicillium, Yeast, HIV (iv) Polio Question 92. The carrier of parasite of malaria is Female Anopheles mosquito. This chapter addresses the solution for these also. 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. The S Chand Science Solutions for Class 8 have been explained in such a manner that it helps students to know the concepts with ease. Science for Tenth Class Part 2 (Hindi) Chemistry Book-10 Lakhmir Singh. Question 63. Which of the following cannot be used as a food preservative? And when this housefly sits on uncovered food, they may transfer the pathogens and food gets contaminated. A. Alexander Fleming Streptomycin, tetracycline and erythromycin are some of the commonly known antibiotics which are made from fungi and bacteria. AWARENESS SCIENCE FOR CLASS 8 Lakhmir Singh. (v) d ; Answer: What are antibiotics? A. female anopheles (ii) a ; We should keep our surrounding clean and dry. This book really help the 9th Class Students in Science Examination. (a) female Anopheles mosquito carries the parasite of malaria. Lakhmir Singh and Manjit Kaur class 8 science textbook solutions hold a high regard among students of CBSE Class 8 students. Question 43. C. bacteria … Viruses are too much smaller in comparison to other micro-organisms. Mehta, a renowned botanist, remembered for his valuable research on wheat rust. 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. Preservation by deep freezing means preservation of food material in the extreme cold. solution, icse-allied publishers The synthesis of food by photosynthesis takes place in leaves with the help of inorganic material like carbon-dioxide and water in the presence of sunlight and chlorophyll. Question 18. Answer: What is their function? Question 86. (b) (i) Female Anopheles mosquito (ii) Plasmodium (iii) Malaria (c) Yellow vein mosaic of bhindi (Okra) Streptomycin and erythromycin are two commonly known antibiotics which are made from fungi and bacteria. Some of micro-organisms are used recycling of materials in nature and increasing the fertility of soil. Science for Tenth Class Part 1 (Hindi) Physics Book-10 Lakhmir Singh. Answer: Class 8, Lakhmir Singh. You can find the complete syllabus in the solutions developed by the Selfstudys. Question 78. (c) microscope It lives in the root nodules of leguminous plants such as beans and peas, with which it has a symbiotic relationship. Class – 6 (Six). A. cholera Answer: (ii) rhizobium Answer: NCERT Solutions of Class 8 Science of Chapter 18 includes solutions of all 11 questions given in … Name of the Author – Lakhmir Singh Manjit Kaur. Answer: Class – 8 (Eight). Housefly is most common carrier of communicable diseases. D. Kneading Question 17. Yeast is used for commercial production of alcohol and wine. D. female anopheles mosquito Science books written by S Chand are very popular and are followed by several schools due to its practical examples and cohesive content. Answer: park.. ISBN-13: 9789352530243. Female Anopheles mosquito carries the parasite of malaria. It's All About Science Physics Class 8 R P Rana. Answer: Visit now and download Free PDFs of solved chapter-wise solutions for Lakhmir Singh and Manjit Kaur … Social Science. Column A 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. The acetobacter bacteria is then added to alcohol. Lakhmir Singh and Manjit Kaur Science solution: … Name any two special chemicals which are used as food preservatives. Protozoa Plasmodium causes malaria disease. The malaria disease is caused by a protozoan called plasmodium. Question 83. Name any four diseases which can be prevented by vaccination. The temperature and pressure during lightning convert atmospheric nitrogen into oxides of nitrogen. Question 57. Question 7. What are the major groups of micro-organisms? Publisher: S.Chand & Company Pvt.Ltd. What is the name of micro-organisms which reproduce only inside the living … and ………… for ages. Female Aedes mosquito acts as a carrier of dengue virus. So guy's today I am providing you the pdf file of class 10th p... Hey guys,, How's your studies going on? These solutions will provide you with an edge over the others because S Chand Biology Class 10 Solutions are concise and to the point. Question 47 B. Name one plant disease each caused: Author: Lakhmir Singh & Manjit Kaur. Name the bacterium which converts milk into curd: Answer. (a) (i) Female Aedes mosquito (ii) Dengue D. female anopheles mosquito B. cockroach A. virus Question 87. C. a fungus Microorganisms such bacteria and fungi that grow on our food items sometimes produce toxic substances. Alexander Fleming discovered the antibiotic “Penicillin” in 1929. C. growth of yeast cells (ii) Measles Question 73. What should an object do to produce sound? Mention any three ways of preventing diseases spread by mosquitoes. How do viruses differ from other micro-organisms such as bacteria? Some of the micro-organisms are used to preparation of medicines. (b) viruses A. Answer: Several diseases, including cholera, tuberculosis, smallpox and hepatitis can be prevented by vaccination. Question 30. D. infection Answer: Name two food materials which are preserved by sun-drying method in our homes. Answer: Microorganisms are used for various purposes such as: Question 59. Lakhmir Singh Manjit Kaur Class 8 Science Solution. It increases the volume of dough. NCERT Solutions of Class 8 Science of Chapter 16 includes solutions of all 17 questions given in your NCERT book. D. fungus Answer: A. protozoa Which of the following is not a use of micro-organisms? Name the micro-organisms present in the soil and in the root nodules of leguminous plants which can fix atmospheric nitrogen. Bubbles of the gas fill the dough and increase its volume. C. hydrochloric acid HIV – Virus, Question 94. Which micro-organism is utilized in making curd from milk ? Read 2 reviews from the world's largest community for readers. Question 81. He graduated with a Physics (Honours) degree from the Hindu College and later obtained M.Sc. Name two leguminous plants which can fix nitrogen. Diseases athlete’s food and ring worm are caused by fungi. Answer: (e) fungi. Excel in academics with NCERT Solutions for CBSE Class 8 Science Chapter 6 Combustion and Flame. OP Malhotra Differentiation S.Chand ISC Class-12 Maths Solutions Ch-8. S Chand Class 8 Science Chapter 2 Micro Organisms Friends And Foe Solutions are considered an extremely helpful source for exam preparation. B. housefly Some micro-organisms decompose the organic matter of dead plants and animals and convert them into simple substances which mix up with the soil. (b) Anthrax disease is caused by a bacterium. Vaccination protect the children from number of diseases. Question 28. C. dragonfly Chapter – 11. Question 58. (i) Tuberculosis Board – CBSE. Viruses differ from other micro-organisms because they are too much smaller in comparison to other micro-organisms. 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. The following diseases are caused by the micro-organisms: Question 65. (a) Name (i) mosquito P, and (ii) disease Question Answer: Jams and jellies are preserved by using sugar. Question 19. Answer: S Chand Class 8 Science Chapter 2 Micro Organisms Friends And Foe Solutions are free of cost for the students. Name the disease caused by HIV. (b) Citrus canker – Bacteria S.Chand’s Science Book-8 B K Gowel. From Delhi University in yr 1970. Answer: The communicable diseases can occur and spread in the following ways: Question 67 A. Answer: D. bacteria Name two diseases spread by mosquitoes. What is meant by fermentation? Medium – English Medium. Question 45 B. Question 44 A. Question 85. Answer: Class 8 is one of the most important stages in a student’s life. Hey guys,, How's your studies going on? 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. These nitrogen compounds combine with rainwater to form nitric and nitrous acid which mix with the soil. Name any two human diseases caused by fungi. (D) Blue-green algae These are: Bacteria, viruses, Protozoa, some fungi and Algae. Senior Teacher of Science in reputed school of Directorate of Education, Delhi. 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. C. malaria Question 39. D. an alga C. alcohol Contact. Answer: I hope you are doing well ! Answer: When yeast is mixed in dough for making bread, the yeast reproduces rapidly and produces carbon dioxide during respiration. The S Chand Class 8 Science Solutions chapter-wise is given below. This Pasteurized milk can be consumed without boiling as it is free from harmful microbes. Name the instrument (or device) which is needed to see the micro-organisms. All updated in a single page. (d) Cholera is caused by………….. Question 91. What is food poisoning? An antibiotic Penicillin was extracted from fungus (mould) by Alexander Fleming in 1929. The parasite called Plasmodium causes a disease known as: (e) Common salt has been used to preserve…………. Answer: (A) Lactobacillus bacteria They are also used in cleaning up of the environment. 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. Why are antibiotics not effective against ‘common cold’ and ‘flu’? C. protozoa Question 21. Answer: Lakhmir Singh’s Science Teacher’s Resource Kit For Class 6 – Lakhmir Singh’s Science is a series of books for Classes 1 to 8 which conforms to the NCERT syllabus. D. viruses Subject – Science. Answer: Microscope is needed to see the micro-organisms. 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. Streptomycin, tetracycline and erythromycin are some of the commonly known antibiotics which are made from fungi and bacteria. Since the immune system of children is not strong and they are more likely to catch any disease very easily, so all the children should be vaccinated at the proper ages to provide them immunity from certain diseases. Antibiotics are not effective against ‘common cold’ and ‘flu’ as these are caused by viruses. Chapter 3 – Synthetic Fibres And Plastics. Practice Questions. Blue green algae fix the atmospheric nitrogen to enrich soil with nitrogen and hence, increase soil fertility. (b) The fruits which are preserved in the form of jams by using sugar as preservative are mango and orange. (a) The plant disease, Rust of wheat is caused by fungi. Question 13. (a) Fixing nitrogen Board – CBSE. (vi) Typhoid The micro-organism which is capable of converting sugar into alcohol and carbon dioxide is: B. Edward jenner Question 9. Lakhmir Singh Manjit Kaur Class 6 Science Solution. It is involved in the fixation of nitrogen in leguminous plants (pulses). A vaccine is a special kind of preparation which provides immunity against a particular disease. Question 60. Fill in the following blanks with suitable words: Some of the antibodies remain in the body for a long time and protect it from any future attack of disease germs. Food preservation: Processing of food to prevent their spoilage and to retain their nutritive value for period is called food preservation. C. fermentation We should not let water collect anywhere in the neighborhood. They do not show most of the characteristics of the living organisms like respiration. Name two food materials which are preserved by using common salt. Eukaryotic. Answer: Answer: A. preparation of medicines (or drugs) (v) Cholera Answer: Answer: These NCERT Solutions for Class 6 Social Science help you understand concepts, events, etc. Question 52. Answer: Carbon dioxide is the gas which is mainly responsible for causing global warming. Lakhmir Singh Class 8 Science Chapter 2 Micro Organisms Friends And Foe Solutions give students an advantage with practical questions. Which of the following disease is not caused by viruses? A. a bacterium 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. sodium metabisulphate, sodium benzoate and citric acid are used as a food preservative whereas sodium hydroxide is not used as food preservative. Question 10. C. Louis Pasteur Answer: (a) female Anopheles mosquito? Yeast is used in the production of: B. protozoan (g)Producing antibiotics Answer: In this process, first alcohol is produce by using yeast. Answer: Chapter 3: Synthetic Fibres and Plastics. from Delhi University. (f) milk B. preparation of food by photosynthesis (C) Spirogyra algae Question 54 A. Why should we not let water collect anywhere in the neighbourhood? Subject – Science. Tuberculosis disease spreads by breathing in air containing micro-organisms. Food materials such meat and fish are usually preserved by deep freezing. Answer: Organisms … How do mosquitoes carry disease-causing micro-organisms and spread diseases? We preserve cooked food in the refrigerator at home. Which natural phenomenon occurring in the sky is responsible for nitrogen fixation? Answer: Name the causative micro-organisms of the following animal diseases: 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. There are various ways of preventing the occurrence and spreading of communicable diseases. Answer: Which of the following increases the fertility of soil Mosquito acts a carrier of disease causing micro-organism and spreads diseases from one person to another. What is the full form of HIV? Name two food materials which can be preserved by using sugar. (a) Rust of wheat These are as follows: Question 68 A. B. sodium hydroxide Name the -micro-organism which is used for the large scale production of alcohol. Question 33. (b) What causes this disease? Name an antibiotic extracted from fungus (mould). These make the food unfit for consumption. (g) As a result of nitrogen cycle, the percentage of nitrogen in the atmosphere remains more or less……. Question 55 B. Louis Pasteur discovered fermentation in 1857. Edward Jenner discovered the vaccine for smallpox in 1978. The full form of HIV is Human Immunodeficiency Virus. Question 41. State any two ways of preventing diseases spread by houseflies. B. fungi Yeast is used in baking industry for making bread. (c) Yellow vein mosaic of bindi (Okra) Several diseases including tuberculosis, smallpox, cholera and hepatitis can be prevented by vaccination. Name any two diseases spread by housefly. Answer: Blue green algae are known as ‘biological nitrogen-fixer’ as they fix the atmospheric nitrogen. D. viruses Answer: D. protozoan Louis Pasteur Discovered fermentation in 1857. Question 37. xi science reference scribd. S Chand ICSE Solutions for Class 10 Maths Banking Exercise 2: Ques No 1. About the Lakhmir Singh Class 8 Science Solutions Authors. Rhizobium bacterium is found in the soil. Question 1. Medium – English Medium. All updated in a single page. Antibiotics should not be taken unnecessarily. NCERT Solutions for class 9 provide you with a quick way to complete your homework. Answer: Name the microbe which causes malaria disease. Keep the infected person separated from others & advice him/ her to keep a handkerchief on the nose and mouth while sneezing. B. sodium hydroxide OP Malhotra Triangles Class-9 S.Chand ICSE Maths Ch-8. (b) Viruses – (I) HIV (II) Tobacco Mosaic virus (TMV) C. cholera Name any two S Chand ICSE Maths Solutions for Class 10 Chapter 2 Banking Exercise 2. Answer: What is the name of micro-organisms which reproduce only inside the living cells of other organisms ? When this contaminated food is consumed by a person, pathogens enter into his body and causes various diseases. ICSE - goyal brothers Answer: She graduated with a B.Sc. *Science , Mathematics *1.List of All Subjects Covered in RD Sharma Chapter 1 Rational Numbers Chapter 2 Powers Chapter 3 Squares and Square Roots An antibiotic Penicillin was extracted from fungus (mould) by Alexander Fleming in 1929. Malaria disease spreads through insect bites. Lakhmir Singh and Manjit Kaur Science solution: Force and Pressure Chapter 11. For Study plan details. Answer: When this infected mosquito bites a healthy person, it transfers the microbes into his blood stream, hence the healthy person also gets malarial disease. solution. The temperature and pressure during lightning convert atmospheric nitrogen into oxides of nitrogen. 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. Yeast is used in baking industry for making bread. The process of conversion of sugar into alcohol is known as fermentation. Question 84. * 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. Question 29. A. heat Cholera, typhoid and tuberculosis are caused by bacteria whereas measles is caused by a virus. Language: English. The S Chand Science Chapter 2 Micro Organisms Friends And Foe Solutions are considered the best when it comes to preparing for Class 8. 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