NCERT - Class 12 Biology Questions and Answers from Chapter "Evolution" | GkSeries

Questions
61 Which of the following gases provided the carbon skeleton of living things during the origin of life?
1 Water vapour
2 Methane
3 Nitrogen
4 Ammonia

Answer: Ammonia
62 Solar system originated from Solar Nebula--- billion years ago
1 1.6
2 3.6
3 4.6
4 5.7

Answer: 4.6
63 Who have a perfect pair of sex chromosomes?
1 Girls only
2 Boys only
3 Both girls and boys
4 It depends on many other factors

Answer: Girls only
64 Which one is a possible progeny in F2 generation of pure bred tall plant with round seed and short plant with wrinkled seeds?
1 Tall plant with round seeds
2 Tall plant with wrinkled seeds
3 Short plant with round seed
4 All of the above

Answer: All of the above
65 The theory of spontaneous generation stated that:
1 life arose from living forms only
2 life can arise from both living and non-living
3 life can arise from non-living things only.
4 life arises spontaneously, neither from living nor from the non-living

Answer: life can arise from non-living things only.
66 The bones of forelimbs of whale, bat, cheetah and man are similar in structure, because:
1 one organism has given rise to another
2 they perform the same function
3 the have biochemical similarities
4 they share a common ancestor

Answer: they share a common ancestor
67 Viviparity is considered to be more evolved because:
1 the young ones are left on their own
2 the young ones are protected by a thick shell
3 the young ones are protected inside the mother’s body and are looked after they are born leading to more chances of survival
4 the embryo takes a long time to develop

Answer: the young ones are protected inside the mother’s body and are looked after they are born leading to more chances of survival
68 The approximate time when life originated dates back to
1 200-300 million years
2 3000-4000 million years
3 4000-5000 million years
4 500-1000 million years

Answer: 3000-4000 million years
69 The first anaerobic photoautotrophs originated--- million years ago
1 1000-2000
2 3300-3500
3 3600-4200
4 4000-4200

Answer: 3300-3500
70 Life originated about 3.6 billion years ago in the
1 Precambrian era
2 Cambrian era
3 Silurian era
4 Mesozoic era

Answer: Precambrian era
71 Which of the following is not a direct conclusion that can be drawn from Mendel�s Experiment?
1 Only one parental trait is expressed
2 Two copies of each trait is inherited in sexually reproducing organism
3 For recessive trait to be expressed, both copies should be identical
4 Natural selection can alter frequency of an inherited trait.

Answer: Natural selection can alter frequency of an inherited trait.
72 With whom you can associate theory of evolution?
1 Charles Darwin
2 Mendel
3 Stanley miller
4 Harold Urey

Answer: Charles Darwin
73 Angiosperms (Flowering plants) originated in
1 Devonian period
2 Jurassic period
3 Cretaceous period
4 Triassic

Answer: Cretaceous period
74 Protenoid microspheres could produce an isolating membrane if---- is added to the aqueous solution:
1 Lipids
2 Nucleic acid
3 Proteins
4 Polysaccharides

Answer: Lipids
75 The most accepted line of descent in human evolution is:
1 Australopithecus → Ramapithecus → Homo sapiens → homo habilis
2 Homo erectus → Homo habilis → Homo sapiens
3 Ramapithecus → Homo habilis → Homo erectus → Homo sapiens
4 Australopithecus → Ramapithecus → Homo erectus → Homo habilis → Homo sapiens.

Answer: Ramapithecus → Homo habilis → Homo erectus → Homo sapiens

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