Answer: Microscope is needed to see the micro-organisms. 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. (b) The fruits which are preserved in the form of jams by using sugar as preservative are mango and orange. 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. C. growth of yeast cells Question 1. Question 20. Which of the following is not a use of micro-organisms? The main aim of writing this series is to help the learners understand difficult scientific concepts in a simple manner in easy language. Milk is turned into curd by bacteria. (d) Algae – (I) Spirogyra (II) Chlamydomonas Edition: 2019. Answer: Question 29. How do viruses differ from other micro-organisms such as bacteria? Answer: Question 82. 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. They just reproduce. Question 44 A. Answer: Here we give Chapter 11 all solution of Class 8. Question 61. AWARENESS SCIENCE FOR CLASS 8 Lakhmir Singh. Some of the antibodies remain in the body for a long time and protect it from any future attack of disease germs. C. dragonfly (b) Female Aedes mosquito acts as carrier of dengue virus. Lakhmir Singh and Manjit Kaur class 8 science textbook solutions hold a high regard among students of CBSE Class 8 students. Answer: What is the mode of transmission of the following diseases? Question 25. Keep the infected person separated from others & advice him/ her to keep a handkerchief on the nose and mouth while sneezing. What is food poisoning? The process of converting atmospheric nitrogen into compounds of nitrogen is called nitrogen fixation. An antibiotic Penicillin was extracted from fungus (mould) by Alexander Fleming in 1929. Antibiotics are not effective against ‘common cold’ and ‘flu’ as these are caused by viruses. (vi) Typhoid Answer: Visit official Website CISCE for detail information about ICSE Board Class-9. Name an antibiotic extracted from fungus (mould). (f) milk Housefly is most common carrier of communicable diseases. Answer: No. A. sodium metabisulphate Question 6. And when this housefly sits on uncovered food, they may transfer the pathogens and food gets contaminated. (b) (i) Female Anopheles mosquito (ii) Plasmodium (iii) Malaria Name the microbe which causes malaria disease. They do not show most of the characteristics of the living organisms like respiration. (a) The plant disease, Rust of wheat is caused by fungi. About the Lakhmir Singh Class 8 Science Solutions Authors. A person must finish the full course of antibiotics prescribed by the doctor. (b) Micro-organisms like bacteria and fungi present in the spoilt dish of mutton causes the disease, food poisoning. Answer: Hence, viruses differ from other micro-organisms. The houseflies feed on garbage, animal excreta and dead organic matter. Board – CBSE. S Chand ICSE Maths Solutions for Class 10 Chapter 4 Linear Inequations in One Variables. Which of the following is not a communicable disease? Micro-organisms are too much smaller that they cannot be seen with naked eye. Name the gas present in atmosphere which is mainly responsible for causing global warming. C. alga Mention any three ways of preventing diseases spread by mosquitoes. What are the major groups of micro-organisms? Mosquito repellant creams should be applied on the exposed parts of the body. So, when all your chapters are crystal clear, scoring higher marks in the examination will become much easier. (D) Blue-green algae Answer: *Science , Mathematics *1.List of All Subjects Covered in RD Sharma Chapter 1 Rational Numbers Chapter 2 Powers Chapter 3 Squares and Square Roots These are as follows: Question 68 A. 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. C. malaria When yeast is mixed in dough for making bread, the yeast reproduces rapidly and produces carbon dioxide during respiration. Mosquito acts a carrier of disease causing micro-organism and spreads diseases from one person to another. How do houseflies carry disease-causing microbes-(or pathogens)? These substances are again used by other plants and animals. Name two leguminous plants which can fix nitrogen. C. bacteria Lightning is a natural phenomenon which occurs in the sky and responsible for nitrogen fixation. Blue green algae fix the atmospheric nitrogen to enrich soil with nitrogen and hence, increase soil fertility. Chlamydomonas – Algae; D. dengue B. protozoan Answer: What is meant by communicable diseases? This book really help the 9th Class Students in Science Examination. Question 43. These acids are utilized by various organisms. Louis Pasteur Discovered fermentation in 1857. Question 12. It increase the volume of dough. Answer: Preservation by deep freezing means preservation of food material in the extreme cold. Question 15. 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) Yellow vein mosaic of bindi (Okra) – Virus, Question 95. AWARENESS SCIENCE FOR CLASS 8 Lakhmir Singh. NCERT Solutions for class 9 provide you with a quick way to complete your homework. Food can be preserved using following methods: Question 54 B. (a) female Anopheles mosquito carries the parasite of malaria. (viii) Malaria 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) (i) Female Aedes mosquito (ii) Dengue State the various ways of preventing the occurrence and spreading of communicable diseases. D. polio D. yeast This Pdf Help the student who are not able to buy the Book. Senior Teacher of Science in reputed school of Directorate of Education, Delhi. Answer: B and C Answer: Amoeba, Lactobacillus, Chlamydomonas, Penicillium, Yeast, HIV After consuming a dish of mutton, a person complained of nausea, vomiting, diarrhoea, and pain in the abdomen. Answer: The spreading of diseases by houseflies can be prevented by following ways: Question 45 A. A. virus Lakhmir Singh Science Solutions Class 8 Chapter, Lakhmir singh and manjit kaur (d) Cholera is caused by………….. Lakhmir Singh Solutions for CBSE Class 8, 9, 10 for the academic year 2020-21 are provided at BYJU’S. 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. (vii) g, Question 93. Eukaryotic. Food materials such meat and fish are usually preserved by deep freezing. Name the scientist who discovered ‘penicillin’. What is meant by ‘nitrogen fixation’ ? Answer: Protozoa Plasmodium causes malaria disease. C. hydrochloric acid physics notes class 11 chapter 4 motion in a plane part 1. s chand s principles of physics for class xi english as. B. fungus B. protozoan Yeast is used for commercial production of alcohol and wine. Answer. Meat and fish are preserved by using common salt. How do micro-organisms help in increasing soil fertility? Manjit Kaur has been a school teacher for many years, and she has co-authored various science books. C. A and D We should keep our surrounding clean and dry. The carrier of malaria causing protozoan is: These micro-organisms are commonly called biological nitrogen fixers. B. preparation of food by photosynthesis (c) protozoa Answer: Lakhmir Singh Manjit Kaur Class 8 Science Solution. A vaccine is a special kind of preparation which provides immunity against a particular disease. Question 7. Name any two human diseases caused by bacteria. xi science reference scribd. If not, how can they be seen? (ix) Dengue C. protozoan And the working mechanism of the antibiotics is to break the cell wall and attack on the bacteria. How do mosquitoes carry disease-causing micro-organisms and spread diseases? A. measles Milk contains many microorganisms. C. a fungus Organisms … Answer: C. alcohol When cooked food is kept in a cold place, then the food does not get spoiled easily. Important Keywords. C. cholera Answer: All updated in a single page. A. bacteria The first antibiotic called penicillin was extracted from: S Chand started his teaching career as a lecturer in Dayal Singh College of the University of Delhi. (iv) c ; We will help as soon as possible. (a) The fruits which are preserved in the form of pickles by using oil and vinegar as preservative are raw mango and lemon. 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 Lactobacillus – Bacteria ; (a) by fungi It increases the volume of dough. Lakhmir Singh and Manjit Kaur class 8 science textbook solutions hold a high regard among students of CBSE Class 8 students. Question 1. Viruses differ from other micro-organisms because they are too much smaller in comparison to other micro-organisms. Food hygiene is essential for preventing food poisoning. Answer: Can micro-organisms be seen with the naked eye? They just reproduce. These questions will test your cognizance, understanding, evaluating and drawing skills. Name the scientist who discovered the-vaccine for smallpox. Question 76. Question 63. State the beneficial effects (or usefulness) of micro-organisms in our lives. May 21, 2019. Certain microbes are also used in the biological treatment of sewage and industrial effluents. A. heat Alcohol can be converted into vinegar by the action of micro-organisms called bacteria. What is a vaccine? B.Sc.,B.Ed. Answer: Cholera, typhoid and tuberculosis are caused by bacteria whereas measles is caused by a virus. The vaccine for smallpox was discovered by: D. fungus Subject – Science. Female Anopheles mosquito is a carrier of malarial parasite. Class 6/7/8. Class – 8. Our experts make the chapters interesting so that you enjoy your studying process and score well without stress. State two ways in which nitrogen gas of the atmosphere can be ‘fixed’ in nature to get nitrogen compounds in the soil. (d) Causing malaria Question 18. You will find all the solutions in a detailed manner and without any mistake. Answer: Visit now and download Free PDFs of solved chapter-wise solutions for Lakhmir Singh and Manjit Kaur … Question 73. Question 39. A. Alexander Fleming Thus, micro-organisms decompose the harmful and smelly dead remains of plants and animals into harmless materials and thereby clean up the environment. Name one animal disease each caused: Question 56. Question 16. The houseflies feed on garbage, animal excreta and dead organic matter. Question 75. B. Edward jenner Answer: You can find the complete syllabus in the solutions developed by the Selfstudys. Jams and jellies are preserved by using sugar. Answer: A and B Answer: Degree from Delhi University. D. measles Excel in academics with NCERT Solutions for CBSE Class 8 Science Chapter 6 Combustion and Flame. Question 42. 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