Evolution - Chapter End Test | Class-12 Biology

             

CLASS-XII    BIOLOGY     CHAPTER END TEST

CHAPTER-06: EVOLUTION

Q.1	For the MN-blood group system, the frequencies of M and N alleles are 0.7 and 0.3, respectively. The expected frequency of MN-blood group bearing organisms is likely to be a. 42% b. 49% c. 9% d. 58%	1M
Q.2	The most accepted line of descent in human evolution is: Australopithecus →→ Ramapithecus → Homo sapiens → Homo habilis Homo erectus → Homo habilis → Homo sapiens Ramapithecus → Homo habilis → Homo erectus → Homo sapiens Australopithecus → Ramapithecus → Homo erectus →Homo habilis → Homo sapiens.	1M
Q.3	Variations during mutations of meiotic recombination are: random and directionless random and directional random and small random, small and directional	1M
Q.4	In 1953 S. L. Miller created primitive earth conditions in the laboratory and gave experimental evidence for origin of first form of life from pre-existing non-living organic molecules. The primitive earth conditions created include: low temperature, volcanic storms, atmosphere rich in oxygen low temperature, volcanic storms, reducing atmosphere high temperature, volcanic storms, non-reducing atmosphere high temperature, volcanic storm s, reducing atmosphere containing CH 4 , NH 3 etc.	1M
Q.5	Differentiate between convergent and divergent evolution.	2M
Q.6	Explain the French naturalist’s idea of evolution.	2M
Q.7	Explain in details the mechanism of natural selection at work with the help of the Moth species collected in England between 1850 and 1920.	3M
Q.8	All living creatures are related by descent from common ancestors. Evolution in organisms occurs through changes in heritable traits—the inherited characteristics of an organism. It explains how life developed on Earth and how different species are connected. Divergent evolution, coevolution, parallel evolution, and convergent evolution are important types of evolution. There is much evidence regarding evolution like fossils, homologous and analogous organs, vestigial organs, biochemical evidence etc. Identify the examples of convergent evolution from the following           a- Flippers of penguins and dolphins        c- Eyes of Octopus and mammals           b- Vertebrate brains                                  d- all are correct Assertion: Darwin worked at Galapagos Island and observed the beak shape of birds. Reason- Such birds are called Darwi finches and these show adaptive radiation.           a- Both assertion and reason are correct and reason is correct explanation of                 assertion.           b-Both assertion and reason are correct and reason is not a correct                 explanation of assertion.           c - Assertion is true but the reason is false           d- Assertion is false but the reason is true. Which one of the following is not associated with marsupials of Australia a- Tiger cat            b- Koala  c- Kangaroo          d- All are associated with Australian marsupials Concept of saltation (single-step large mutation) was proposed by a- Hugo DeVries                           c- Darwin           b- Lamarck                                   d- Pasteur	4M
Q.9	Explain the Hardy-weinberg principle in details.	5M