MCQ Questions for Class 12 Biology: Ch 7 Evolution

MCQ Questions for Class 12 Biology: Ch 7 Evolution

1. Primitive atmosphere was made up of the mixture of : 
(a) Oxygen, ammonia, methane, water
(b) Hydrogen, ammonia, methane, oxygen
(c) Hydrogen, steam, methane, ammonia
(d) Oxygen, methane, water, nickel
► (c) Hydrogen, steam, methane, ammonia

2. Snakes do not have legs because
(a) Legs are lost during their entry in tunnels  
(b) Legs are lost during evolution
(c) The ancestors of reptiles did not have legs
(d) There are no legs in lizards
► (b) Legs are lost during evolution

3. The concept of chemical evolution is based on 
(a) interaction of water, air and clay under intense heat
(b) effect of solar radiation on chemicals
(c) possible origin of life by combination of chemicals under suitable environmental conditions
(d) crystallization of chemicals
► (c) possible origin of life by combination of chemicals under suitable environmental conditions

4. Thorn of Bougainvillea and tendril of cucurbita are example of
(a) analogous organs
(b) homologous organs
(c) vestigial organs
(d) retrogressive evolution
► (b) homologous organs

5. Ancestor of man who first time showed bipedal movement
(a) Cro-magnon   
(b) Australopithecus
(c) Java apeman
(d) Peking man
► (b) Australopithecus

6. Which character applies to Homo sapiens:
(a) Opposable toe 
(b) Large canine  
(c) Cranial capacity 1450 cc
(d) Chin prominence absent
► (c) Cranial capacity 1450 cc

7. One major criticism of Darwin's theory is  that : 
(a) It presumes that environment upon earth has been changing through ages
(b) It does not explain variations with heredity  
(c) It overestimates reproductive capacity of animals and plants
(d) It does not explain vestigial organs
► (b) It does not explain variations with heredity  

8. Homo erectus different from Cro-magnon man in having :
(a) Jaws protruding out 
(b) Tool making
(c) Slopping jaws
(d) Arts and paintings
► (a) Jaws protruding out 

9. Pre-historic man who gave proper burial to the dead for the first time was
(a) Cro-magnon man
(b) Neanderthal man
(c) Pecking man
(d) Java man
► (b) Neanderthal man

10. On which continent maximum fossils of prehistoric man have been found :
(a) Africa
(b) Europe  
(c) Asia
(d) America
► (a) Africa

11. Which one of the following is not a living fossil?
(a) Sphenodon
(b) Archaeopteryx
(c) Peripatus
(d) King crab
► (b) Archaeopteryx

12. Name of the scientist who gave Mutation Theory :
(a) Wallace
(b) Mathus
(c) Darwin
(d) De Vries
► (d) De Vries

13. The age of rock is calculated on the basis of ______.
(a) amount of uranium present
(b) types of fossils present
(c) amount of lead present
(d) none of the above
► (a) amount of uranium present

14. Which of the following evidence does not favour the Lamarckian concept ?
(a) Absence of limbs in snakes
(b) resecne of webbed toes in aquatic birds  
(c) Melanization in peppered moth in industial area
(d) Lack of pigment in cave dwelling animals
► (c) Melanization in peppered moth in industial area

15. One of the important consequences of geographical isolation is
(a) preventing speciation
(b) speciation through reproductive isolation
(c) random creation of new species
(d) no change in the isolated fauna
► (b) speciation through reproductive isolation

16. Common origin of man and chimpanzee is best shown by
(a) Chromosomes
(b) Cranial capacity
(c) Dental formula
(d) Binocular vision
► (a) Chromosomes

17. Chances of inheritable and evolution changes are more in such species which reproduce by : 
(a) Parthenogenesis
(b) Fission
(c) Sexual reproduction
(d) Asexual reproduction
► (c) Sexual reproduction

18. Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin of life?
(a) They were partially isolated from the surrounding
(b) They could separate combinations of molecules from the surroundings
(c) They could maintain an internal environment
(d) They were able to reproduce
► (b) They could separate combinations of molecules from the surroundings

19. Which of the following bird will be called most successfully evolved?
(a) Lays 5 eggs, 5 hatch and 5 reproduce
(b) Lays 9 eggs, 9 hatch and 3 reproduce
(c) Lays 2 eggs, 2 hatch and 2 reproduce
(d) Lays 10 eggs, 5 hatch and 4 reproduce
► (a) Lays 5 eggs, 5 hatch and 5 reproduce

20. Darwin explained origin of species through :
(a) Hybridization
(b) Mutation
(c) Acquired characters
(d) Natural selection
► (d) Natural selection

21. Human settlement started around 10, 000 years ago due to starting of
(a) Agriculture
(b) Mannering
(c) Fishing
(d) Weaving
► (a) Agriculture

22. What was the basic principle of Lamarckism :
(a) Inheritance of acquired character
(b) Survival of the fittest 
(c) Natural selection
(d) Variations
► (a) Inheritance of acquired character

23. It is believed that the first organisms which inhabitated earth's surface were  
(a) Autotrophs
(b) Mixotrophs
(c) Heterotrophs
(d) Chromatotrophs
► (d) Chromatotrophs

24. The first ancestor of man whose fossils have been discovered was 
(a) Pithecanthropus 
(b) Zinjanthropus
(c) Australopithecus
(d) Neanderthal man
► (c) Australopithecus

25. Homo sapiens arose in Africa and moved across continents and developed into distinct races during?
(a) Ice age between 75000-10,000 years ago
(b) Ice age between 5000-6000 years ago
(c) Stone age between 10,000 years ago
(d) Stone age between 2000-4000 years ago
► (a) Ice age between 75000-10,000 years ago

26. Evolution of modern man is most interesting and appears parallel evolution of
(a) Body height and weight
(b) Human brain and language
(c) Human brain and height
(d) Height and body hairs
► (b) Human brain and language

27. Animal husbandry and plant breeding programmes are the examples of:
(a) reverse evolution
(b) artificial selection
(c) mutation
(d) natural selection
► (b) artificial selection

28. During the course of origin of life what wa the sequence of substances which appeared on earth : 
(a) Water, oxygen, nucleic acids. enzymes
(b) Amino acids, ammonia, phosphates,nucleic acids
(c) Glucose, amino acids, nucleic acids, proteins
(d) Ammonia, Amino acids, proteins, nucleic acids
► (d) Ammonia, Amino acids, proteins, nucleic acids

29. According to Neo-Darwinism, natural selection operates through_______.
(a) Fighting between organisms
(b) Killing weaker organism
(c) Variations
(d) Differential reproduction
► (d) Differential reproduction

30. When two species of different genealog y come to resemble each other as a result of adaptation, the phenomenon is termed
(a) microevolution
(b) co-evolution
(c) convergent evolution
(d) divergent evolution
► (c) convergent evolution

31. C.Fuhlrott made an important discovery in evolution and he discovered :  
(a) Neanderthal man
(b) Cro-magnon man 
(c) Classification of man
(d) Characters of madern apes
► (a) Neanderthal man

32. Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the biogenic origin of life?
(a) They were able to reproduce
(b) They could separate combinations of molecules from the surroundings
(c) They were partially isolated from the surroundings
(d) They could maintain an internal environment
► (b) They could separate combinations of molecules from the surroundings

33. What's the difference between natural selection and sexual selection?
(a) Sexual selection is a type of natural selection
(b) Sexual selection occurs during sex
(c) Sexual selection occurs within demes, natural selection does not
(d) Natural selection is a type of sexual selection
► (a) Sexual selection is a type of natural selection

34. According to Oparin, life originated as 
(a) Self reproduction
(b) God's desire
(c) Effect of sunlight on mud
(d) None of the above
► (a) Self reproduction

35. Largest cranial capacity was found in :
(a) Peking man   
(b) Cro-magnon man
(c) Java man
(d) Neanderthal man 
► (d) Neanderthal man 

36. Which scientist gave the initial idea of survival of the fittest :
(a) Wallace
(b) Spencer
(c) Darwin
(d) Mendel
► (b) Spencer
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