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

Questions
46 Which type of selection is industrial melanism observed in moth, Biston bitularia:
1 Stabilising
2 Directional
3 Disruptive
4 Artificial

Answer: Directional
47 Variations during mutations of meiotic recombinations are:
1 random and directionless
2 random and directional
3 random and small
4 random, small and directional

Answer: random, small and directional

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48 Which of the following is an example for link species?
1 Lobe fish
2 Dodo bird
3 Sea weed
4 Tyrannosaurus rex

Answer: Lobe fish
49 Appearance of antibiotic-resistant bacteria is an example of:
1 adaptive radiation
2 transduction
3 pre-existing variation in the population
4 divergent evolution

Answer: pre-existing variation in the population
50 Animal husbandry and plant breeding programmes are the examples of:
1 reverse evolution
2 artificial selection
3 mutation
4 natural selection

Answer: artificial selection
51 Which of the following is totally impossible outcome of Mendel�s Experiment?
1 3 tall 1 short plant
2 24 tall and 8 short plants
3 8 tall and 0 short plants
4 4 tall plants and 1 medium height plant.

Answer: 4 tall plants and 1 medium height plant.
52 Which section of DNA provides information for one protein
1 Nucleus
2 Chromosomes
3 Trait
4 Gene

Answer: Gene
53 What is the probability that the male progeny will be a boy?
1 50%
2 56%
3 47.43%
4 It varies

Answer: 50%
54 Which of the following can be called a characteristic?
1 Plants can photosynthesis
2 We have 2 eyes
3 Mango tree is multicellular
4 All of these

Answer: All of these
55 Palantological evidences for evolution refer to the:
1 development of embryo
2 homologous organs
3 fossils
4 analogous organs.

Answer: fossils
56 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
1 42%
2 49%
3 9%
4 58%

Answer: 42%
57 Homologous organ have
1 Same structure, same function
2 Different structure, different function
3 Same structure, different function
4 different structure, same function

Answer: Same structure, different function
58 The first cells like structures evolved in
1 Ocean
2 Air
3 Land
4 Desert

Answer: Ocean
59 Eukaryotes with a nucleus evolved ---million years ago
1 2200
2 3800
3 4500
4 1600

Answer: 1600
60 In primitive earth, energy was formed from
1 Lightning
2 Volcanic eruption
3 UV light
4 All of these

Answer: Volcanic eruption

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