{"id":4757,"date":"2016-05-18T11:49:00","date_gmt":"2016-05-18T06:19:00","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/ncert-solutions-class-8-science-02-microoraganisms-friends-and-foe\/"},"modified":"2018-06-22T18:11:20","modified_gmt":"2018-06-22T12:41:20","slug":"ncert-solutions-for-class-8-science-microoraganisms-friends-and-foe","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-microoraganisms-friends-and-foe\/","title":{"rendered":"NCERT Solutions for Class 8 Science Microoraganisms Friends and Foe"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-microoraganisms-friends-and-foe\/#NCERT_Class_8_Science_Chapter_wise_Solutions\" >NCERT Class 8 Science Chapter wise Solutions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-microoraganisms-friends-and-foe\/#NCERT_Solutions_for_Class_8_Science_Microoraganisms_Friends_and_Foe\" >NCERT Solutions for Class 8 Science Microoraganisms Friends and Foe<\/a><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-microoraganisms-friends-and-foe\/#Class_%E2%80%93VIII_Science_NCERT_SOLUTION\" >Class \u2013VIII Science NCERT SOLUTION<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-microoraganisms-friends-and-foe\/#Ch-2_Microoganisms_Friend_and_Foe\" >Ch-2 Microoganisms: Friend and Foe<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-microoraganisms-friends-and-foe\/#3_Match_the_organisms_in_Column_A_with_their_action_in_Column_B\" >3. Match the organisms in Column A with their action in Column B.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-microoraganisms-friends-and-foe\/#4_Can_microorganisms_be_seen_with_the_naked_eyes_If_not_how_can_they_be_seen\" >4. Can microorganisms be seen with the naked eyes? If not, how can they be seen?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-microoraganisms-friends-and-foe\/#5_What_are_the_major_groups_of_microorganisms\" >5. What are the major groups of microorganisms?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-microoraganisms-friends-and-foe\/#6_Name_the_microorganism_which_can_fix_atmospheric_nitrogen_in_the_soil\" >6. Name the microorganism which can fix atmospheric nitrogen in the soil.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-microoraganisms-friends-and-foe\/#7_Write_10_lines_on_the_usefulness_of_microorganisms_in_our_lives_Ans_The_usefulness_of_microorganisms_are_as_follows\" >7. Write 10 lines on the usefulness of microorganisms in our lives. \nAns. The usefulness of microorganisms are as follows:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-microoraganisms-friends-and-foe\/#8_Write_a_short_paragraph_on_the_harms_caused_by_microorganisms\" >8. Write a short paragraph on the harms caused by microorganisms.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-microoraganisms-friends-and-foe\/#9_What_are_antibiotics_What_precautions_must_be_taken_while_taking_antibiotics\" >9. What are antibiotics? What precautions must be taken while taking antibiotics?<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-microoraganisms-friends-and-foe\/#NCERT_solutions_for_Class_8_Science\" >NCERT solutions for Class 8 Science<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-microoraganisms-friends-and-foe\/#CBSE_app_for_Students\" >CBSE app for Students<\/a><\/li><\/ul><\/nav><\/div>\n<p>NCERT Solutions for Class 8 Science Microoraganisms Friends and Foe Class 8 Science book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. Class 8 Science chapter wise NCERT solution for Class 8 Science all the chapters can be downloaded from our website and myCBSEguide mobile app for free.<\/p>\n<p style=\"text-align: center;\"><strong>NCERT solutions for Science\u00a0Microoraganisms Friends and Foe <a class=\"button\" href=\"https:\/\/mycbseguide.com\/downloads\/cbse-class-08-science\/1466\/ncert-solutions\/5\/\">Download as PDF<\/a><\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/media-mycbseguide.s3.ap-south-1.amazonaws.com\/images\/blog\/08_Science_Book.jpg\" alt=\"NCERT Solutions for Class 8 Science Microoraganisms Friends and Foe\" width=\"140\" height=\"174\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Class_8_Science_Chapter_wise_Solutions\"><\/span>NCERT Class 8 Science Chapter wise Solutions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>1 \u2013 Crop Production and Management<\/li>\n<li>2 \u2013 Microorganisms : Friend and Foe<\/li>\n<li>3 \u2013 Synthetic Fibres and Plastics<\/li>\n<li>4 \u2013 Materials : Metals and Non-Metals<\/li>\n<li>5 \u2013 Coal and Petroleum<\/li>\n<li>6 \u2013 Combustion and Flame<\/li>\n<li>7 \u2013 Conservation of Plants and Animals<\/li>\n<li>8 \u2013 Cell \u2013 Structure and Functions<\/li>\n<li>9 \u2013 Reproduction in Animals<\/li>\n<li>10 \u2013 Reaching The Age of Adolescence<\/li>\n<li>11 \u2013 Force and Pressure<\/li>\n<li>12 \u2013 Friction<\/li>\n<li>13 \u2013 Sound<\/li>\n<li>14 \u2013 Chemical Effects of Electric Current<\/li>\n<li>15 \u2013 Some Natural Phenomena<\/li>\n<li>16 \u2013 Light<\/li>\n<li>17 \u2013 Stars and The Solar System<\/li>\n<li>18 \u2013 Pollution of Air and Water<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Solutions_for_Class_8_Science_Microoraganisms_Friends_and_Foe\"><\/span>NCERT Solutions for Class 8 Science Microoraganisms Friends and Foe<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h6 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"Class_%E2%80%93VIII_Science_NCERT_SOLUTION\"><\/span><strong>Class \u2013VIII Science NCERT SOLUTION<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<div>\n<h6 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"Ch-2_Microoganisms_Friend_and_Foe\"><\/span><strong>Ch-2 Microoganisms: Friend and Foe<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>1. Fill in the blanks.<\/strong><\/p>\n<p><strong>(a) Microorganisms can be seen with the help of a________________.<\/strong><\/p>\n<p><strong>(b) Blue-green algae fix ______________ directly from air to enhance fertility.<\/strong><\/p>\n<p><strong>(c) Alcohol is produced with the help of __________.<\/strong><\/p>\n<p><strong>(d) Cholera is caused by ____________.<\/strong><\/p>\n<p><strong>Ans. <\/strong>Fill in the blanks.<\/p>\n<p><strong>(a)<\/strong> Microorganisms can be seen with the help of a <strong><u>microscope<\/u><\/strong>.<\/p>\n<p><strong>(b)<\/strong> Blue-green algae fix <strong><u>nitrogen<\/u><\/strong> directly from air to enhance fertility.<\/p>\n<p><strong>(c)<\/strong> Alcohol is produced with the help of <strong><u>yeast<\/u><\/strong>.<\/p>\n<p><strong>(d)<\/strong> Cholera is caused by <strong><u>bacteria<\/u><\/strong>.<\/p>\n<hr \/>\n<p><strong>2. Tick the correct answer.<\/strong><\/p>\n<p><strong>(a) Yeast is used in the production of\u00a0 <\/strong><\/p>\n<p><strong>(i) Sugar\u00a0\u00a0 <\/strong><\/p>\n<p><strong>(ii) alcohol <\/strong><\/p>\n<p><strong>(iii) hydrochloric acid <\/strong><\/p>\n<p><strong>(iv) oxygen<\/strong><\/p>\n<p><strong>(b) The following is an antibiotic<\/strong><\/p>\n<p><strong>(i) Sodium carbonate <\/strong><\/p>\n<p><strong>(ii) Streptomycin <\/strong><\/p>\n<p><strong>(iii) Alcohol\u00a0\u00a0 <\/strong><\/p>\n<p><strong>(iv) Yeast<\/strong><\/p>\n<p><strong>(c) Carrier of malaria-causing protozoan is <\/strong><\/p>\n<p><strong>(i) Female Anopheles mosquito <\/strong><\/p>\n<p><strong>(ii) cockroach<\/strong><\/p>\n<p><strong>(iii) housefly \u00a0\u00a0\u00a0<\/strong><\/p>\n<p><strong>(iv) butterfly<\/strong><\/p>\n<p><strong>(d) The most common carrier of communicable diseases is<\/strong><\/p>\n<p><strong>(i) <\/strong><strong>ant\u00a0\u00a0\u00a0 <\/strong><\/p>\n<p><strong>(ii) housefly <\/strong><\/p>\n<p><strong>(iii) dragonfly\u00a0\u00a0 <\/strong><\/p>\n<p><strong>(iv) spider<\/strong><\/p>\n<p><strong>(e) \u00a0The bread or idli dough rises because of<\/strong><\/p>\n<p><strong>(i) heat\u00a0\u00a0 <\/strong><\/p>\n<p><strong>(ii) grinding <\/strong><\/p>\n<p><strong>(iii) growth of yeast cells \u00a0<\/strong><\/p>\n<p><strong>(iv) kneading<\/strong><\/p>\n<p><strong>\u00a0(f) The process of conversion of sugar into alcohol is called<\/strong><\/p>\n<p><strong>(i) nitrogen fixation\u00a0 <\/strong><\/p>\n<p><strong>(ii) moulding <\/strong><\/p>\n<p><strong>(iii) fermentation\u00a0 <\/strong><\/p>\n<p><strong>(iv) infection.<\/strong><\/p>\n<p><strong>Ans. <\/strong><strong>(a) <\/strong>(ii) alcohol.<\/p>\n<p><strong>(b) <\/strong>(ii) Streptomycin<\/p>\n<p><strong>(c) <\/strong>(i) female anopheles mosquito<\/p>\n<p><strong>(d) <\/strong>(ii) housefly<\/p>\n<p><strong>(e) <\/strong>(iii) growth of yeast cells<\/p>\n<p><strong>(f) <\/strong>(iii) fermentation.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 8 Science Microoraganisms Friends and Foe<\/p>\n<h6><span class=\"ez-toc-section\" id=\"3_Match_the_organisms_in_Column_A_with_their_action_in_Column_B\"><\/span><strong>3. Match the organisms in Column A with their action in Column B.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<table class=\"responsive\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td style=\"height: 12.0pt; width: 106.15pt;\"><strong>\u00a0\u00a0 A\u00a0\u00a0\u00a0\u00a0 <\/strong><\/td>\n<td style=\"height: 12.0pt; width: 113.7pt;\"><strong>B<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"height: 20.05pt; width: 106.15pt;\"><strong>\u00a0(i) Bacteria\u00a0\u00a0\u00a0 <\/strong><\/td>\n<td style=\"height: 20.05pt; width: 113.7pt;\"><strong>(a) Fixing nitrogen<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"height: 20.05pt; width: 106.15pt;\"><strong>\u00a0(ii) Rhizobium\u00a0\u00a0\u00a0 <\/strong><\/td>\n<td style=\"height: 20.05pt; width: 113.7pt;\"><strong>(b) Setting curd<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"height: 17.4pt; width: 106.15pt;\"><strong>\u00a0(iii) Lactobacillus <\/strong><\/td>\n<td style=\"height: 17.4pt; width: 113.7pt;\"><strong>(c)\u00a0 Baking bread<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"height: 16.7pt; width: 106.15pt;\"><strong>\u00a0\u00a0(iv) Yeast\u00a0\u00a0\u00a0\u00a0 <\/strong><\/td>\n<td style=\"height: 16.7pt; width: 113.7pt;\"><strong>(d) Causing malaria<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"height: 17.4pt; width: 106.15pt;\"><strong>\u00a0(v) A protozoan\u00a0\u00a0\u00a0 <\/strong><\/td>\n<td style=\"height: 17.4pt; width: 113.7pt;\"><strong>(e) Causing cholera<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"height: 20.75pt; width: 106.15pt;\"><strong>\u00a0(vi) A virus\u00a0\u00a0\u00a0 <\/strong><\/td>\n<td style=\"height: 20.75pt; width: 113.7pt;\"><strong>(f) Causing AIDS<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Ans. <\/strong>Match the following:-<\/p>\n<table class=\"responsive\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td style=\"width: 113.4pt;\"><u>Column <strong>A<\/strong><\/u><\/td>\n<td style=\"width: 113.4pt;\"><u>Column <strong>B<\/strong><\/u><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 113.4pt;\">(i)<\/td>\n<td style=\"width: 113.4pt;\">(e)<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 113.4pt;\">(ii)<\/td>\n<td style=\"width: 113.4pt;\">(a)<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 113.4pt;\">(iii)<\/td>\n<td style=\"width: 113.4pt;\">(b)<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 113.4pt;\">(iv)<\/td>\n<td style=\"width: 113.4pt;\">(c)<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 113.4pt;\">(v)<\/td>\n<td style=\"width: 113.4pt;\">(d)<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 113.4pt;\">(vi)<\/td>\n<td style=\"width: 113.4pt;\">(f)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h6><span class=\"ez-toc-section\" id=\"4_Can_microorganisms_be_seen_with_the_naked_eyes_If_not_how_can_they_be_seen\"><\/span><strong>4. Can microorganisms be seen with the naked eyes? If not, how can they be seen?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>No, we cannot see them with unaided eyes. They can be seen with the help of a microscope.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 8 Science Microoraganisms Friends and Foe<\/p>\n<h6><span class=\"ez-toc-section\" id=\"5_What_are_the_major_groups_of_microorganisms\"><\/span><strong>5. What are the major groups of microorganisms?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>The major groups of microorganisms are:-<\/p>\n<p><strong>a.<\/strong> Bacteria<\/p>\n<p><strong>b.<\/strong> Fungi<\/p>\n<p><strong>c.<\/strong> Protozoa<\/p>\n<p><strong>d.<\/strong> Some algae<\/p>\n<hr \/>\n<h6><span class=\"ez-toc-section\" id=\"6_Name_the_microorganism_which_can_fix_atmospheric_nitrogen_in_the_soil\"><\/span><strong>6. Name the microorganism which can fix atmospheric nitrogen in the soil.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>The microorganisms which can fix atmospheric nitrogen are Rhizobium, Azatobactor, Blue green algae etc.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 8 Science Microoraganisms Friends and Foe<\/p>\n<h6><span class=\"ez-toc-section\" id=\"7_Write_10_lines_on_the_usefulness_of_microorganisms_in_our_lives_Ans_The_usefulness_of_microorganisms_are_as_follows\"><\/span><strong>7. Write 10 lines on the usefulness of microorganisms in our lives.<\/strong><br \/>\n<strong>Ans. <\/strong>The usefulness of microorganisms are as follows:<span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>a.<\/strong> Lactobacillus- a bacterium useful in making curd etc.<\/p>\n<p><strong>b.<\/strong> Bacteria are useful in formation of bread and cheese.<\/p>\n<p><strong>c.<\/strong> They are used in cleaning of environment.<\/p>\n<p><strong>d.<\/strong> Yeasts are used in production of alcohol.<\/p>\n<p><strong>e.<\/strong> They are used in making antibiotics.<\/p>\n<p><strong>f.<\/strong> They are used in making vaccines.<\/p>\n<p><strong>g.<\/strong> Microorganisms are used to make manure.<\/p>\n<p><strong>h.<\/strong> Bacteria are main nitrogen fixing agent.<\/p>\n<p><strong>i. <\/strong>They fix the carbon dioxide into useful sugar.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 8 Science Microoraganisms Friends and Foe<\/p>\n<h6><span class=\"ez-toc-section\" id=\"8_Write_a_short_paragraph_on_the_harms_caused_by_microorganisms\"><\/span><strong>8. Write a short paragraph on the harms caused by microorganisms.<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>The harm caused by microorganisms are as follows-<\/p>\n<p><strong>a.<\/strong> They cause many communicable diseases like cholera, common cold, tuberculosis etc.<\/p>\n<p><strong>b.<\/strong> Malaria is caused by a microorganism called plasmodium.<\/p>\n<p><strong>c.<\/strong> Several plants diseases are caused by bacteria and fungi.<\/p>\n<p><strong>d.<\/strong> Food poisoning is caused by microorganism.<\/p>\n<p><strong>e.<\/strong> They are responsible for spoiling of food.<\/p>\n<hr \/>\n<p style=\"text-align: center;\">NCERT Solutions for Class 8 Science Microoraganisms Friends and Foe<\/p>\n<h6><span class=\"ez-toc-section\" id=\"9_What_are_antibiotics_What_precautions_must_be_taken_while_taking_antibiotics\"><\/span><strong>9. What are antibiotics? What precautions must be taken while taking antibiotics?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><strong>Ans. <\/strong>The medicines that kill or stop the growth of the disease-causing microorganism are called antibiotic. Streptomycin, tetracycline, erythromycin etc. are common antibiotics. They are manufactured by growing specific micro-organisms and are used to cure a variety of diseases.<\/p>\n<p>Following precautions must be taken in using antibiotics-<\/p>\n<p><strong>(i)<\/strong> These medicines should be taken only on the advice of a qualified doctor.<\/p>\n<p><strong>(ii)<\/strong> One must finish the course prescribed by the doctor.<\/p>\n<p><strong>(iii)<\/strong> If anybody takes antibiotics when not needed, his or her body may develop resistance against that antibiotic.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_solutions_for_Class_8_Science\"><\/span>NCERT solutions for Class 8 Science<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>NCERT Solutions Class 8 Science PDF (Download) Free from myCBSEguide app and myCBSEguide website. Ncert solution class 8 Science includes text book solutions from Class 8 Science Book . NCERT Solutions for CBSE Class 8 Science have total 18 chapters. 8 Science NCERT Solutions in PDF for free Download on our website. Ncert Social Science class 8 solutions PDF and Science ncert class 8 PDF solutions with latest modifications and as per the latest CBSE syllabus are only available in myCBSEguide.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"CBSE_app_for_Students\"><\/span>CBSE app for Students<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>To download\u00a0NCERT Solutions for class 8 Social Science, Computer Science, Home Science,Hindi ,English, Maths Science do check myCBSEguide app or website. myCBSEguide provides sample papers with solution, test papers for chapter-wise practice, NCERT solutions, NCERT Exemplar solutions, quick revision notes for ready reference, CBSE guess papers and CBSE important question papers. Sample Paper all are made available through\u00a0<a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide&amp;referrer=utm_source%3Dmycbse_bottom%26utm_medium%3Dtext%26utm_campaign%3Dmycbseads\"><strong>the best app for CBSE students<\/strong><\/a>\u00a0and myCBSEguide website.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>NCERT Solutions for Class 8 Science Microoraganisms Friends and Foe Class 8 Science book solutions are available in PDF format for free download. These ncert book chapter wise questions and answers are very helpful for CBSE exam. CBSE recommends NCERT books and most of the questions in CBSE exam are asked from NCERT text books. &#8230; <a title=\"NCERT Solutions for Class 8 Science Microoraganisms Friends and Foe\" class=\"read-more\" href=\"https:\/\/mycbseguide.com\/blog\/ncert-solutions-for-class-8-science-microoraganisms-friends-and-foe\/\" aria-label=\"More on NCERT Solutions for Class 8 Science Microoraganisms Friends and Foe\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":-1,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[281,1383],"tags":[283,1523,216,349],"class_list":["post-4757","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ncert-solutions","category-science-cbse-class-08","tag-cbse-study-material","tag-class-8","tag-ncert-solutions","tag-science"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>NCERT Solutions for Class 8 Science Microoraganisms Friends and Foe<\/title>\n<meta name=\"description\" content=\"NCERT Solutions for Class 8 Science Microoraganisms Friends and Foe in PDF format for free download. 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