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Biology M.C.Q (1 Marks)

Evolution · Chhattisgarh Board (CGBSE) STD 12 Science (Chhattisgarh - English Medium). 282 questions.

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M.C.Q (1 Marks)

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MCQ 11 Mark
Identify the examples of convergent evolution from the following:
  • A
    Flippers of penguins and dolphins.
  • ✓
    Eyes of octopus and mammals.
  • C
    Vertebrate brains.
  • D
    None of these
Answer
Correct option: B.
Eyes of octopus and mammals.
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MCQ 21 Mark
Which one of the following character differentiate man from other mammals?
  • A
    Superior intelligence
  • B
    Power of speech
  • C
    Social life
  • ✓
    Greater cranial capacity
Answer
Correct option: D.
Greater cranial capacity
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MCQ 31 Mark
In Homo habilis, 'habilis' refers to:
  • A
    Wandering species
  • B
    Ancient man
  • C
    Modern man
  • ✓
    Tool maker
Answer
Correct option: D.
Tool maker
The first hominid Homo habilis lived in Africa about $2$ million years ago. Homo habilis made primitive stone tools. Thus, they are called tool maker or handy man.
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MCQ 41 Mark
Evolution of unicellular organism was in the $..........$ era.
  • A
    Proterozoic
  • B
    Palaeozoic
  • ✓
    Archaeozoic
  • D
    Mesozoic
Answer
Correct option: C.
Archaeozoic
Archaeozoic era occured before $2.5$ billion years ago, when the only life forms were blue$-$green algae and bacteria.
Evolution of unicellular organisms occurred during this era.
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MCQ 51 Mark
Industrial melanism is an example of:
  • A
    Drug resistance.
  • B
    Darkening of skin due to smoke from industries.
  • ✓
    Protective resemblance with the surroundings.
  • D
    Defensive adaptation of skin against ultraviolet radiations.
Answer
Correct option: C.
Protective resemblance with the surroundings.
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MCQ 61 Mark
Basic principles of embryonic development were pronounced by:
  • ✓
    Von Baer
  • B
    Weismann
  • C
    Haeckel
  • D
    Morgan
Answer
Correct option: A.
Von Baer
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MCQ 71 Mark
Under which condition, Hardy Weinberg's law is violated?
  • A
    Natural selection
  • B
    Mutation
  • C
    Immigration and genetic drift
  • ✓
    All of the above
Answer
Correct option: D.
All of the above
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MCQ 81 Mark
Which one of the following statements is correct?
  • A
    Cro$-$magnon man’s fossil has been found in Ethiopia.
  • ✓
    Homo erectus is the ancestor of man.
  • C
    Neanderthal man is the direct ancestor of Homo sapiens.
  • D
    Australopithecus is the real ancestor of modern man.
Answer
Correct option: B.
Homo erectus is the ancestor of man.
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MCQ 91 Mark
In case of a man, when the entire sole rests on the ground during walking, it is known as:
  • ✓
    Plantigrade
  • B
    Digitigrade
  • C
    Perikaryon
  • D
    Hallux
Answer
Correct option: A.
Plantigrade
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MCQ 101 Mark
‘Golden age of dinosaurs’$/$ Age of reptiles was:
  • ✓
    Mesozoic
  • B
    Coenozoicc
  • C
    Palaeozoic
  • D
    Psychozoic
Answer
Correct option: A.
Mesozoic
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MCQ 111 Mark
Example of a homologous organ:
  • ✓
    The arm of a human, wing of a bird.
  • B
    Wing of an insect, wing of a bird.
  • C
    Leg of a dog, leg of a spider.
  • D
    None of the above.
Answer
Correct option: A.
The arm of a human, wing of a bird.
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MCQ 121 Mark
Tasmanian Wolf is a marsupial while Wolf is a placental mammal. This shows.
  • ✓
    Convergent evolution.
  • B
    Divergent evolution.
  • C
    Inheritance of acquired characters.
  • D
    None of these.
Answer
Correct option: A.
Convergent evolution.
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MCQ 131 Mark
Our solar system was formed about $.............$ years ago.
  • A
    $15$ million
  • B
    $15$ billion
  • ✓
    $4.5$ to $5$ billion
  • D
    $10$ to $15$ billion
Answer
Correct option: C.
$4.5$ to $5$ billion
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MCQ 141 Mark
Which type of selection is industrial melanism observed in moth, Biston bitularia:
  • ✓
    Directional
  • B
    Stabilising
  • C
    Disruptive
  • D
    Artificial
Answer
Correct option: A.
Directional
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MCQ 151 Mark
In which epoch the fossils of Sinanthropus pekinensis have been discovered?
  • ✓
    Pleistocene
  • B
    Pliocene
  • C
    Eocene
  • D
    Palaeocene
Answer
Correct option: A.
Pleistocene
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MCQ 161 Mark
Which one of the following pair has homologous organs?
  • ✓
    Pectoral fins of a fish and forelimbs of a horse.
  • B
    Wings of a bat and wings of cockroach.
  • C
    Air sac of fish and lungs of frog.
  • D
    Wings of a bird and wings of a butterfly.
Answer
Correct option: A.
Pectoral fins of a fish and forelimbs of a horse.
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MCQ 171 Mark
What kind of evidence suggested that man is more closely related with chimpanzee than with other hominoid apes?
  • A
    Evidence from $\text{DNA}$ from sex chromosomes only.
  • B
    Comparison of chromosomes morphology only.
  • C
    Evidence from fossil remains and the fossil mitochondrial $\text{DNA}$ alone.
  • ✓
    Evidence from $\text{DNA}$ extracted from sex chromosomes, autosomes and mitochondria.
Answer
Correct option: D.
Evidence from $\text{DNA}$ extracted from sex chromosomes, autosomes and mitochondria.
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MCQ 181 Mark
According to abiogenic origin of life, proposed by Oparin $.............$ was the simplest organic compound to arise.
  • A
    Organic acids
  • ✓
    Hydrocarbons
  • C
    Carbohydrate
  • D
    Proteins
Answer
Correct option: B.
Hydrocarbons
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MCQ 191 Mark
Random genetic drift in a population probably results from:
  • ✓
    Highly genetically variable individuals.
  • B
    Interbreeding within the population.
  • C
    Constant low mutation rate.
  • D
    Large population size.
Answer
Correct option: A.
Highly genetically variable individuals.
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MCQ 201 Mark
Homologous organs like the limbs of a horse and flipper of whale indicate:
  • A
    Convergent evolution
  • B
    Discontinuous evolution
  • ✓
    Divergent evolution
  • D
    Mutational variations
Answer
Correct option: C.
Divergent evolution
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MCQ 211 Mark
Which of the following is the earliest era?
  • A
    Coenozoic
  • B
    Mesozoic
  • C
    Paleozoic
  • ✓
    Pre$-$cambrian
Answer
Correct option: D.
Pre$-$cambrian
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MCQ 221 Mark
Evolution in which the animals of two different gene ecology show too much similarity with one another, as a result of adaptation is termed as:
  • A
    Parallel evolution
  • B
    Retrogressive evolution
  • C
    Progressive evolution
  • ✓
    Convergent evolution
Answer
Correct option: D.
Convergent evolution
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MCQ 231 Mark
Early African man was discovered in $1948$ by Leakey. It was:
  • A
    Homo habilis
  • B
    Gigantopithecus
  • ✓
    Proconsul
  • D
    Homo erectus
Answer
Correct option: C.
Proconsul
In $1948,$ Leakey reported skull of Proconsul africanus.
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MCQ 241 Mark
Which of the following is used as an atmospheric pollution indicator?
  • A
    Lepidoptera.
  • ✓
    Lichens.
  • C
    Lycopersicon.
  • D
    Lycopodium.
Answer
Correct option: B.
Lichens.
sess roots and hence air is their primary source for most elements. They will not grow in the areas that are polluted. So, lichen is used as a reliable indicator of atmospheric pollution.
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MCQ 251 Mark
The most accepted line of descent in human evolution is:
  • ✓
    Ramapithecus $\rightarrow$ Homo habilis $\rightarrow$ Homo erectus $\rightarrow$ Homo sapiens.
  • B
    Australopithecus $\rightarrow$ Ramapithecus $\rightarrow$ Homo erectus $\rightarrow$ Homo habilis $\rightarrow$ Homo sapiens.
  • C
    Homo erectus $\rightarrow$ Homo habilis $\rightarrow$ Homo sapiens.
  • D
    Australopithecus $\rightarrow$ Ramapithecus $\rightarrow$ Homo sapiens $\rightarrow$ homo habilis.
Answer
Correct option: A.
Ramapithecus $\rightarrow$ Homo habilis $\rightarrow$ Homo erectus $\rightarrow$ Homo sapiens.
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MCQ 261 Mark
$...........$ is a vestigial organ.
  • ✓
    Vermiform appendix.
  • B
    None of the above.
  • C
    Papillae.
  • D
    Intestinal villi.
Answer
Correct option: A.
Vermiform appendix.
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MCQ 271 Mark
Which one of the following sets includes only the vestigial structures in man?
  • A
    Body hair, olecranon process, coccyx, patella.
  • B
    Wisdom teeth, mammary glands, coccyx, patella.
  • ✓
    Coccyx, nictitating membrane, vermiform appendix, ear muscles.
  • D
    Coccyx, body hair, ear ossicles, vermiform appendix.
Answer
Correct option: C.
Coccyx, nictitating membrane, vermiform appendix, ear muscles.
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MCQ 281 Mark
The habitable part of earth's crust is about:
  • ✓
    $22.5\ km$
  • B
    $222.5\ km$
  • C
    $22.5$ meters
  • D
    $2.25\ km$
Answer
Correct option: A.
$22.5\ km$
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MCQ 291 Mark
During evolution of man, many changes have taken place in his ancestral character. Which one of the following is an unsignificant change?
  • A
    Change of diet from hard tough fruits and roots into soft food.
  • B
    Qualitative improvement in the structure of hands skills for making tools.
  • ✓
    Disappearance of tail.
  • D
    Improvement in speech for communication and social behaviour.
Answer
Correct option: C.
Disappearance of tail.
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MCQ 301 Mark
Which of the following is correct order of evolutionary history of man?
  • A
    Peking man, Homo sapiens, Neanderthal, Cro$-$magnon.
  • B
    Peking man, Neanderthal, Homo sapiens, Cro$-$magnon.
  • ✓
    Peking man, Heidelberg man, Neanderthal, Cro$-$magnon.
  • D
    Peking man, Neanderthal, Homo sapiens, Heidelberg man.
Answer
Correct option: C.
Peking man, Heidelberg man, Neanderthal, Cro$-$magnon.
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MCQ 311 Mark
The most apparent change during the evolutionary history of Homo sapiens is traced in:
  • A
    Walking upright.
  • B
    Shortening of jaws.
  • ✓
    Remarkable increase in the brain size.
  • D
    Loss of body hair.
Answer
Correct option: C.
Remarkable increase in the brain size.
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MCQ 321 Mark
Same group of ancestors have formed the mammals adapted to running, flying and swimming. This proves:
  • A
    Speciation
  • B
    Genetic drift
  • C
    Adaptive convergence
  • ✓
    Adaptive radiation
Answer
Correct option: D.
Adaptive radiation
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MCQ 331 Mark
Hardy and Weinberg proposed a principle for $........$ population.
  • A
    Everchanging
  • B
    Unstable
  • C
    Fast changing
  • ✓
    Non$-$evolving
Answer
Correct option: D.
Non$-$evolving
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MCQ 341 Mark
Which one does not favour Lamarckian concept of inheritance of acquired characters?
  • A
    Lack of pigment in cave dwellers.
  • B
    Absence of limbs in snakes.
  • C
    Presence of webbed toes in aquatic birds.
  • ✓
    Melanization of peppered moth in industrial areas.
Answer
Correct option: D.
Melanization of peppered moth in industrial areas.
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MCQ 351 Mark
Neanderthal man was followed by:
  • ✓
    Cro$-$Magnon man
  • B
    Homo sapiens
  • C
    Homo erectus
  • D
    Homo neanderthal
Answer
Correct option: A.
Cro$-$Magnon man
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MCQ 361 Mark
The earliest fossil form in the phylogeny of horse is:
  • A
    Merychippus
  • B
    Mesohippus
  • ✓
    Eohippus
  • D
    Equus
Answer
Correct option: C.
Eohippus
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MCQ 371 Mark
What is common amongst whale, seal and shark?
  • A
    Homeothermy.
  • B
    Seasonal migration.
  • C
    Thick subcutaneous fat.
  • ✓
    Convergent evolution.
Answer
Correct option: D.
Convergent evolution.
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MCQ 381 Mark
Atmosphere around earth is $1600 \ km,$ made up of gaseous mantle with highest $78.03\%$ of:
  • A
    Oxygen
  • B
    Argon
  • ✓
    Nitrogen
  • D
    Carbon dioxide
Answer
Correct option: C.
Nitrogen
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MCQ 391 Mark
Which one of the following statements about fossil human species is correct?
  • A
    Fossils of Homo neanderthalensis have been found recently in South America.
  • B
    Neanderthal man and Cro$-$magnon man did exist for sometime together.
  • C
    Australopithecus fossils have been found in Australia.
  • ✓
    Homo erectus was preceded by Homo habilis.
Answer
Correct option: D.
Homo erectus was preceded by Homo habilis.
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MCQ 401 Mark
Random genetic drift in a population probably results from:
  • A
    Large population size.
  • ✓
    Highly genetically variable individuals.
  • C
    Interbreeding within this population.
  • D
    Constant low mutation rate.
Answer
Correct option: B.
Highly genetically variable individuals.
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MCQ 411 Mark
In primordial atmosphere when the living organism evolved the respiration process was:
  • A
    Anaerobic as it released more energy.
  • B
    Aerobic as it was more complex.
  • C
    Aerobic as it released more energy.
  • ✓
    Anaerobic because early atmosphere contained.
Answer
Correct option: D.
Anaerobic because early atmosphere contained.
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MCQ 421 Mark
Viviparity is considered to be more evolved because:
  • A
    The young ones are left on their own.
  • B
    The young ones are protected by a thick shell.
  • ✓
    The young ones are protected inside the mother's body and are looked after they are born leading to more chances of survival.
  • D
    The embryo takes a long time to develop.
Answer
Correct option: C.
The young ones are protected inside the mother's body and are looked after they are born leading to more chances of survival.
Viviparity is considered to be more evolved because the young ones are protected inside the mother's body and are looked after they are born leading to more chances of survival.
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MCQ 431 Mark
The jurassic period belongs to the era:
  • A
    Coenozoic
  • B
    Paleozoic
  • ✓
    Mesozoic
  • D
    Protozoic
Answer
Correct option: C.
Mesozoic
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MCQ 441 Mark
Dinosaurs dominated the earth about:
  • A
    $10$ million years ago.
  • B
    $50$ million years ago.
  • ✓
    $180$ million years ago.
  • D
    $500$ million years ago.
Answer
Correct option: C.
$180$ million years ago.
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MCQ 451 Mark
One of the important consequences of geographical isolation is:
  • A
    No change in the isolated fauna.
  • B
    Preventing speciation.
  • ✓
    Speciation through reproductive isolation.
  • D
    Random creation of new species.
Answer
Correct option: C.
Speciation through reproductive isolation.
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MCQ 461 Mark
Presence of gills in the tadpole of frog indicates diat.
  • A
    Fishes were amphibious in the past.
  • B
    Fishes evolved from frog$-$like ancestors.
  • C
    Frogs will have gills in future.
  • ✓
    Frogs evolved from gilled ancestors.
Answer
Correct option: D.
Frogs evolved from gilled ancestors.
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MCQ 471 Mark
Which one of the following option gives one correct example each of convergent evolution and divergent evolution?
  • ✓
    Convergent evolution $:$ Eyes of octopus and mammals$;$ Divergent evolution $:$ Bones of forelimbs of vertebrates.
  • B
    Convergent evolution $:$ Thorns of Bougainvillia andtendrils$;$ Divergent evolution $:$ Wings of butterflies and of birds.
  • C
    Convergent evolution $:$ Bones of forelimbs of vertebrates$;$ Divergent evolution $:$ Wings of butterfly and birds.
  • D
    Convergent evolution $:$ Thorns of Bougainvillia andtendrils$;$ Divergent evolution $:$ Eyes of Octopus and of mammals.
Answer
Correct option: A.
Convergent evolution $:$ Eyes of octopus and mammals$;$ Divergent evolution $:$ Bones of forelimbs of vertebrates.
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MCQ 481 Mark
Occurrence of endemic species in South$-$America and Australia is due to:
  • A
    These species have been extinct from other regions.
  • ✓
    Continental separation.
  • C
    There is no terrestrial route to these places.
  • D
    Retrogressive evolution.
Answer
Correct option: B.
Continental separation.
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MCQ 491 Mark
In a random mating population, frequency of disease causing recessive allele is $80\%.$ What would be the frequency of carrier individual in population?
  • A
    $64\%$
  • ✓
    $32\%$
  • C
    $16\%$
  • D
    $100\%$
Answer
Correct option: B.
$32\%$
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MCQ 501 Mark
In Hardy$-$Weinberg equation, the frequency of heterozygous individual is represented by:
  • ✓
    $2\ pq.$
  • B
    $pq.$
  • C
    Both $(a)$ and $(b).$
  • D
    None of these.
Answer
Correct option: A.
$2\ pq.$
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M.C.Q (1 Marks) - Biology STD 12 Science Questions - Vidyadip