{"id":27094,"date":"2019-09-13T12:23:01","date_gmt":"2019-09-13T06:53:01","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/?p=27094"},"modified":"2019-09-16T10:25:33","modified_gmt":"2019-09-16T04:55:33","slug":"class-12-biology-evolution-chapter-7-important-questions","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/class-12-biology-evolution-chapter-7-important-questions\/","title":{"rendered":"Class 12 Biology Evolution Chapter 7 Important Questions"},"content":{"rendered":"

Class 12 Biology Evolution Chapter 7 Important Questions. <\/strong>myCBSEguide has just released Chapter Wise Question Answers for class 12 Biology.\u00a0 There chapter wise Test papers with complete solutions are available for download in\u00a0myCBSEguide<\/a>\u00a0<\/strong>website and mobile app. These Extra Questions with solution are prepared by our team of expert teachers who are teaching grade in CBSE schools for years. There are around 4-5 set of solved Biology Extra questions from each and every chapter. The students will not miss any concept in these Chapter wise question that are specially designed to tackle Board Exam. We have taken care of every single concept given in\u00a0CBSE Class 12 Biology<\/strong>\u00a0syllabus<\/strong><\/a>\u00a0and questions are framed as per the latest marking scheme and blue print issued by CBSE for Class 12.<\/p>\n

CBSE Class 12 Biology Ch \u2013 7 Practice Test<\/strong><\/p>\n

Download as PDF<\/a><\/strong><\/p>\n

CBSE Class 12 Biology Evolution Test Papers<\/h2>\n
Ch-7 Evolution<\/strong><\/div>\n
    \n
  1. The theory of use and disuse was given by\n
      \n
    1. Aristotle<\/span><\/li>\n
    2. Lamarck<\/li>\n
    3. Stebbins<\/li>\n
    4. Vavilox<\/li>\n<\/ol>\n<\/li>\n
    5. What’s the difference between natural selection and sexual selection?\n
        \n
      1. \n
        Sexual selection is a type of natural selection<\/span><\/div>\n<\/li>\n
      2. \n
        Sexual selection occurs during sex<\/span><\/div>\n<\/li>\n
      3. \n
        Sexual selection occurs within demes, natural selection does not<\/span><\/div>\n<\/li>\n
      4. \n
        Natural selection is a type of sexual selection<\/span><\/div>\n<\/li>\n<\/ol>\n<\/li>\n
      5. \n
        How is extinction represented in a tree diagram?<\/div>\n
          \n
        1. \n
          A branch shifts along the Y axis<\/span><\/div>\n<\/li>\n
        2. \n
          A branch shifts along the X axis<\/span><\/div>\n<\/li>\n
        3. \n
          A branch splits<\/span><\/div>\n<\/li>\n
        4. \n
          A branch ends<\/span><\/div>\n<\/li>\n<\/ol>\n<\/li>\n
        5. \n
          What was the mixture of gases used in chamber marked A?
          \n\"Class<\/div>\n
            \n
          1. \n
            Oxygen O2,\u00a0<\/sub>ammonia (NH3<\/sub>), hydrogen H2,\u00a0<\/sub>and water H2<\/sub>O<\/span><\/div>\n<\/li>\n
          2. \n
            Methane(CH4<\/sub>) v, ammonia(NH3<\/sub>), hydrogen H2<\/sub>\u00a0and water H2<\/sub>O<\/span><\/div>\n<\/li>\n
          3. \n
            Oxygen O2<\/sub>, ozone O3<\/sub>, hydrogen H2<\/sub>, and water H2<\/sub>O<\/span><\/div>\n<\/li>\n
          4. \n
            Oxygen O2<\/sub>, ozone O3<\/sub>, hydrogen H2<\/sub>, and water H2<\/sub>O<\/span><\/div>\n<\/li>\n<\/ol>\n<\/li>\n
          5. \n
            \n

            Match the correct brain capacities given in Column B with the primates given in Column A<\/p>\n\n\n\n\n\n\n\n
            Column A<\/strong><\/td>\nColumn B<\/strong><\/td>\n<\/tr>\n
            (a)\u00a0Homo erectus<\/td>\n(i)\u00a0650 – 800 cc<\/td>\n<\/tr>\n
            (b)\u00a0Neanderthal man<\/td>\n(ii)\u00a0900 cc<\/td>\n<\/tr>\n
            (c)\u00a0Homo habilis<\/td>\n(iii)\u00a01400 cc<\/td>\n<\/tr>\n
            (d)\u00a0Australopithecus<\/td>\n(iv)\u00a0600 cc<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
              \n
            1. \n
              (a) – ii, (b) – iii, (c) – i, (d) – iv<\/span><\/div>\n<\/li>\n
            2. \n
              (a) – iii, (b) – ii, (c) – ii, (d) – iv<\/span><\/div>\n<\/li>\n
            3. \n
              Can’t say<\/span><\/div>\n<\/li>\n
            4. \n
              (a) – i, (b) – ii, (c) – iv, (d) – iii<\/span><\/div>\n<\/li>\n<\/ol>\n<\/li>\n
            5. \n
              \n
              The variation and natural selection operates on its own due to random mutations. What does this imply about natural selection?<\/div>\n<\/div>\n<\/li>\n
            6. \n
              \n
              What is the significance of Lederberg experiment?<\/div>\n<\/div>\n<\/li>\n
            7. \n
              \n
              Name the placental mammals corresponding to the Australian ‘spotted cuscus’ and Tasmanian ‘tiger cat’ which have evolved as a result of convergent evolution.<\/div>\n<\/div>\n<\/li>\n
            8. \n
              \n
              Name the common ancestor of great apes and man?<\/div>\n<\/div>\n<\/li>\n
            9. \n
              \n
              What is Archaeopteryx? What is its significance in evolution?<\/div>\n<\/div>\n<\/li>\n
            10. \n
              \n
              Would you consider the wings of butterfly and a bat as a homologous or analogous?<\/div>\n<\/div>\n<\/li>\n
            11. \n
              \n
              \n

              Classify the following as examples of homology and analogy:<\/p>\n\n\n\n\n\n\n\n\n
              (i)<\/td>\nMouth parts of cockroach and butterfly<\/td>\n<\/tr>\n
              (ii)<\/td>\nHearts of rabbits and human beings<\/td>\n<\/tr>\n
              (iii)<\/td>\nEyes of octopus and mammals<\/td>\n<\/tr>\n
              (iv)<\/td>\nSweet potato and potato<\/td>\n<\/tr>\n
              (v)<\/td>\nStings of honey bee and scorpion<\/td>\n<\/tr>\n
              (vi)<\/td>\nTendrils of Lathyrus and tendrils of Gloriosa<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/li>\n
            12. \n
              \n
              What are vestigial organs? Give examples.<\/div>\n<\/div>\n<\/li>\n
            13. \n
              \n
              In the 1950s, there were hardly any mosquitoes in Delhi. The use of pesticide DDT on standing water killed their larvae. It is believed that now there are mosquitoes because they evolved DDT resistance through the interaction of mutation and Natural selection. Point wise, state in a sequence how that could have happened.<\/div>\n<\/div>\n<\/li>\n
            14. \n
              \n
              How does industrial melanism support Darwin’s theory of natural selection explain?<\/div>\n<\/div>\n<\/li>\n<\/ol>\n

              Ch-7 Evolution<\/strong><\/p>\n

              \n

              Answer<\/strong><\/p>\n

                \n
              1. \n
                  \n
                1. Lamarck,\u00a0Explanation:\u00a0<\/strong>The theory of use and disuse was given by Lamarck. In his theory of organic evolution he stressed that those traits or organs are used more evolve faster and those are not used degenerate in course of time.<\/li>\n<\/ol>\n<\/li>\n
                2. \n
                    \n
                  1. Sexual selection is a type of natural selection,\u00a0Explanation:\u00a0<\/strong>Natural selection is the survival of members of species having some new traits that may help the organism in given surrounding. Sexual selection is a kind of natural selection as mating between similar organisms only leads to reproduction.<\/li>\n<\/ol>\n<\/li>\n
                  2. \n
                      \n
                    1. A branch ends,\u00a0Explanation:\u00a0<\/strong>In a tree diagram, the extinction is represented as a branch ends that further do not divide any more. Extinction may be due to changed climatic condition or loss of ecological niche.<\/li>\n<\/ol>\n<\/li>\n
                    2. \n
                        \n
                      1. Methane(CH4<\/sub>) v, ammonia(NH3<\/sub>), hydrogen H2<\/sub>\u00a0and water H2<\/sub>O
                        \nExplanation:\u00a0<\/strong>the gases used in Urey and Miller experiment in chamber marked A are Methane (CH4<\/sub>), ammonia (NH3<\/sub>), hydrogen H2<\/sub>, and water H2<\/sub>O<\/li>\n<\/ol>\n<\/li>\n
                      2. \n
                          \n
                        1. (a) – ii, (b) – iii, (c) – i, (d) – iv
                          \nExplanation:<\/strong><\/p>\n