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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.
31
Selective breeding of organisms (Animal husbandry and plant breeding programs) for specific desirable characteristics are examples of
[1]
Mutation
[2]
Artificial selection
[3]
Reverse evolution
[4]
Natural selection
Answer: Artificial selection
32
According to Darwin, evolution is _______.
[1]
A slow, gradual and continuous process.
[2]
A sudden but discontinuous process
[3]
A slow and discontinuous process.
[4]
A slow, sudden and discontinuous process
Answer: A slow, gradual and continuous process.
33
Fossils are most commonly preserved in
[1]
Metamorphic rocks
[2]
Igneous rocks
[3]
Sedimentary rocks
[4]
Any type of rock
Answer: Sedimentary rocks
34
Darwin judged the fitness of an individual by
[1]
Ability to defend itself
[2]
Strategy to obtain food
[3]
Number of offspring
[4]
Dominance over other individuals
Answer: Number of offspring
35
Darwin’s Finches are an excellent example of
[1]
Floral characters
[2]
Evolutionary relationships
[3]
Morphological features
[4]
Chemical constituents
Answer: Evolutionary relationships
36
Divergent evolution of a single group of organisms in a new environment is called ______.
[1]
Adaptive radiation
[2]
Uniformitarianism
[3]
Catastrophism
[4]
Convergent evolution
Answer: Adaptive radiation
37
Tendrils in plants are an example of
[1]
Convergent evolution
[2]
Adaptive radiation
[3]
Divergent evolution
[4]
Co-evolution
Answer: Convergent evolution
38
Which of the following sentences is correct about microspheres?
[1]
Don't have all properties of life
[2]
Composed of many protein molecules
[3]
Bud to form smaller microspheres
[4]
All of these are correct
Answer: All of these are correct
39
What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors?
[1]
Increasing brain capacity
[2]
Upright posture
[3]
Shortening of jaws
[4]
Binocular vision
Answer: Increasing brain capacity
40
Small and spherical vessels, bounded by a membrane like layer of amino acids are
[1]
Liposomes
[2]
Ribozymes
[3]
Protocell
[4]
Microspheres
41
In nature, the process by which different organisms evolve similar traits is called ______.
[1]
Genetic drift
[2]
Artificial selection
[3]
Divergent evolution
[4]
Convergent evolution
Answer: Convergent evolution
42
Which of the following is used as an atmospheric pollution indicator?
[1]
Lepidoptera
[2]
Lichens
[3]
Lycopersicon
[4]
Lycopodium
43
Analogous organs arise due to:
[1]
divergent evolution
[2]
artificial selection
[3]
genetic drift
[4]
convergent evolution
Answer: convergent evolution
44
Evolution of life shows that life forms had a trend of moving from:
[1]
land to water
[2]
dryland to wet land
[3]
fresh water to sea water
[4]
water to land
45
Fossils are generally found in:
[1]
Sedimentary rocks
[2]
Igneous rocks
[3]
Metamorphic rocks
[4]
Any type of rock
Answer: Sedimentary rocks
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