This practice test has 25 questions (MCQs) from chapter- evolution class 12th Biology.
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Q.1.
Which one of the following phenomena supports Darwin’s concept of natural selection in organic evolution ?
- Development of transgenic animals
- Production of “Dolly’, the sheep by cloning
- Prevalence of pesticide resistant insects
- Development of organs from ‘stem cells’ for organ transplantation.
Answer:
(c) Prevalence of pesticide resistant insects
Explanation: Prevalence of pesticide resistant insects
Explanation: Prevalence of pesticide resistant insects
Q.2.
The phenomenon ‘ontogeny repeats phylogeny’ is explained by
- recapitualtion theory
- Inheritcance theory
- mutation theory
- natural selection theory.
Answer:
(a) recapitualtion theory
Explanation: The phenomenon ‘ontogeny repeats phylogeny’ is explained by recapitualtion theory.
Explanation: The phenomenon ‘ontogeny repeats phylogeny’ is explained by recapitualtion theory.
Q.3.
The presence of gill slits, in the embryos of vertebrates, supports the theory of
- metamorphosis
- biogenesis
- organic evolution
- recapitulation
Answer:
(d) recapitulation
Explanation: The presence of gill slits, in the embryos of vertebrates, supports the theory of recapitulation
Explanation: The presence of gill slits, in the embryos of vertebrates, supports the theory of recapitulation
Q.4.
Which is not a vestigial organ in man ?
- Nictitating membrane
- Tail vertebrae
- Vermiform appendix
- Nails
Answer:
(d) Nails
Explanation: Nails is not a vestigial organ in man
Explanation: Nails is not a vestigial organ in man
Q.5.
Which one is not a vestigia organ ?
- Wings of kiwi
- Coccyx in man
- Pelvic girdle of python
- Flipper of seal
Answer:
(d) Flipper of seal
Explanation: Flipper of seal is not a vestigia organ.
Explanation: Flipper of seal is not a vestigia organ.
Q.6.
By the statement ‘survival of the fittest’, Darwin meant that
- the strongest of all species survives
- the most intelligent of the species survives
- the cleverest of the species survives
- the species most adaptable to changes survives.
Answer:
(d) the species most adaptable to changes survives.
Explanation: the species most adaptable to changes survives.
Explanation: the species most adaptable to changes survives.
Q.7.
Which of the following are the two key concepts of Darwinian theory of evolution ?
- Genetic drift and mutation
- Adaptive radiation and homology
- Mutation and natural selection
- Branching descent and natural selection
Answer:
(d) Branching descent and natural selection
Explanation: Branching descent and natural selection are the two key concepts of Darwinian theory of evolution .
Explanation: Branching descent and natural selection are the two key concepts of Darwinian theory of evolution .
Q.8.
According to Lamarckism, long necked giraffes evolved because
- nature selected only long necked ones
- humans preferred only long necked ones
- short necks suddenly changed into long necks
- of stretching of necks over many generations by short necked ones.
Answer:
(d) of stretching of necks over many generations by short necked ones.
Explanation: long necked giraffes evolved because of stretching of necks over many generations by short necked ones.
Explanation: long necked giraffes evolved because of stretching of necks over many generations by short necked ones.
Q.9.
Which of the following evidences does not favour the Lamarckian concept of inheritance of acquired characters ?
- Lack of pigment in cave-dwelling animlas
- Melanisation in peppered moth
- Absence of limbs in snakes
- Presence of webbed toes in aquatic birds
Answer:
(b) Melanisation in peppered moth
Explanation: Melanisation in peppered moth does not favour the Lamarckian concept of inheritance of acquired characters
Explanation: Melanisation in peppered moth does not favour the Lamarckian concept of inheritance of acquired characters
Q.10.
“Human population grows in geometric ratio while food materials increase in arithmetic proportion”. It is a statement from
- Darwin
- Bateson
- AmartyaSen
- Malthus.
Answer:
(d) Malthus.
Explanation: Malthus.
Explanation: Malthus.
Q.11.
Which one of the following scientist’s name is correctly matched with the theory put forth by him ?
- de Vries – Theory of natural selection
- Darwin – Theory of pangenesis
- Weismann – Theory of continuity of germplasm
- Pasteur – Theory of inheritance of acquired charcters
Answer:
(c) Weismann – Theory of continuity of germplasm
Explanation: Weismann-Theory of continuity of germplasm
Explanation: Weismann-Theory of continuity of germplasm
Q.12.
Single step large mutation leading to speciation is also called
- founder effect
- saltation
- branching descent
- natural selection
Answer:
(b) saltation
Explanation: Single step large mutation leading to speciation is also called saltation
Explanation: Single step large mutation leading to speciation is also called saltation
Q.13.
Hardy-Weinberg equilibrium is known to be affected by gene flow, genetic drift mutation, genetic recombination and
- evolution
- limiting facrtors
- saltation
- natural selection
Answer:
(d) natural selection
Explanation: Hardy-Weinberg equilibrium is known to be affected by gene flow, genetic drift mutation, genetic recombination and natural selection.
Explanation: Hardy-Weinberg equilibrium is known to be affected by gene flow, genetic drift mutation, genetic recombination and natural selection.
Q.14.
The Hardy-Weinberg principle cannot operate if
- a population does not migrate for a longtime to a new habitat
- frequent mutations occur in the population
- the population has no chance of interaction with other populations
- free interbreeding occurs among all members of the population
Answer:
(b) frequent mutations occur in the population
Explanation: The Hardy-Weinberg principle cannot operate if frequent mutations occur in the population
Explanation: The Hardy-Weinberg principle cannot operate if frequent mutations occur in the population
Q.15.
Genetic drift operates only in
- larger populations
- Mendelian populations
- island populations
- smaller populations.
Answer:
(d) smaller populations.
Explanation: smaller populations
Explanation: smaller populations
Q.16.
Which of the following statements is True ?
- Wings to birds and insects are homologous organs.
- Human hands and bird’s wings are analogous organs
- Human hands and bat’s wings are analogous organs.
- Flipper of penguin and dolphin are analogous organs
Answer:
(d) Flipper of penguin and dolphin are analogous organs
Explanation: Flipper of penguin and dolphin are analogous organs
Explanation: Flipper of penguin and dolphin are analogous organs
Q.17.
Replacement of the lighter-coloured variety of peppered moth (Biston betularia) to its darker variety (Biston carbonaria) in England is the example of
- natural selection
- regeneration
- genetic isolation
- temporal isolation
Answer:
(a) natural selection
Explanation: natural selection
Explanation: natural selection
Q.18.
Phenomenon of ‘industrial melanism’ demonstrates
- geographical isolation
- reproductive isolation
- natural selection
- induced mutation
Answer:
(c) natural selection
Explanation: phenomenon of ‘industrial melanism’ demonstrates natural selection
Explanation: phenomenon of ‘industrial melanism’ demonstrates natural selection
Q.19.
presence of gills in the tadpole of frog indicated that
- fishes were amphibious in the past
- fishes evolved from frog-like ancestors
- frogs will have gills in future
- frogs evolved from gilled ancestors
Answer:
(d) frogs evolved from gilled ancestors
Explanation: presence of gills in the tadpole of frog indicated that frogs evolved from gilled ancestors
Explanation: presence of gills in the tadpole of frog indicated that frogs evolved from gilled ancestors
Q.20.
The character that proves that frogs have evolved from fishes is
- their ability to swim in water
- tadpole larva in frogs
- similarity in the shape of the head
- their feeding on aquatic plants
Answer:
(b) tadpole larva in frogs
Explanation: tadpole larva in frogs
Explanation: tadpole larva in frogs
Q.21.
Which is the correct order of increasing geological time scale for a hypothetical vertebrate evolution ?
- Cenozoic, Mesozoic, Palaeozoic, Proterozoic
- Cenozoic, Palaeozoic, Mesozoic, Proterozoic
- Proterozoic, Cenozoic, Palaezoic, Mesozoic
- Proterozoic, Palaeozoic, Mesozoic, Cenozoic
Answer:
(d) Proterozoic, Palaeozoic, Mesozoic, Cenozoic
Explanation: Proterozoic, Palaeozoic, Mesozoic, Cenozoic
Explanation: Proterozoic, Palaeozoic, Mesozoic, Cenozoic
Q.22.
The ‘Devonian period’ is considered to be as
- age of fishes
- age of amphibians
- age of reptiles
- age of mammals
Answer:
(a) age of fishes
Explanation: The ‘Devonian period’ is considered to be as age of fishes.
Explanation: The ‘Devonian period’ is considered to be as age of fishes.
Q.23.
Amphibians were dominant during _______ period.
- Carboniferous
- Silurian
- Ordovician
- Cambrian
Answer:
(a) Carboniferous
Explanation: Carboniferous
Explanation: Carboniferous
Q.24.
The primate which existed 15 mya was
- Homo habilis
- Australopithecus
- Ramapithecus
- Homo erectus
Answer:
(c) Ramapithecus
Explanation: The primate which existed 15 mya was Ramapithecus
Explanation: The primate which existed 15 mya was Ramapithecus
Q.25.
The extinct stone ancestor, who ate only fruits and hunted with stone weapons was
- Ramapithecus
- Australophecus
- Dryopithecus
- Homo erectus
Answer:
(b) Australophecus
Explanation: Australophecus.
Explanation: Australophecus.
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