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Free Download as PDF of the detailed solutions for class 12 Biology from NCERT or CBSE text book as per exam pattern, to help you in day to day learning. We provide all important questions and answers from chapter Evolution of Biology | Page-4
46
Which type of selection is industrial melanism observed in moth, Biston bitularia:
[1]
Stabilising
[2]
Directional
[3]
Disruptive
[4]
Artificial
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
48
Which of the following is an example for link species?
[1]
Lobe fish
[2]
Dodo bird
[3]
Sea weed
[4]
Tyrannosaurus rex
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
53
What is the probability that the male progeny will be a boy?
[1]
50%
[2]
56%
[3]
47.43%
[4]
It varies
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
55
Palantological evidences for evolution refer to the:
[1]
development of embryo
[2]
homologous organs
[3]
fossils
[4]
analogous organs.
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%
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
59
Eukaryotes with a nucleus evolved ---million years ago
[1]
2200
[2]
3800
[3]
4500
[4]
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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