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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.
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
62
Solar system originated from Solar Nebula--- billion years ago
[1]
1.6
[2]
3.6
[3]
4.6
[4]
5.7
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
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
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
70
Life originated about 3.6 billion years ago in the
[1]
Precambrian era
[2]
Cambrian era
[3]
Silurian era
[4]
Mesozoic 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
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
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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