InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Read the following statements and choose the correct option A. Increase in melanized moths after industrialization in Great Britain is a proof for natrual selection B. When more individuals of a population acquire a mean character value, it is called disruption C. Changes in allelic frequency in a population will lead to Hardly Weinberg equilibrium D. Genetic drift changes the existing gene ot allelic frequency in future generationsA. B alone is correctB. D alone if correctC. A and D alone are coorectD. A and C alone are correct |
| Answer» Correct Answer - D | |
| 52. |
About how long ago was the earth formedA. 4.6 billion years agoB. 10 billion years agoC. 3.0 billion years agoD. 20 billion years ago |
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Answer» Correct Answer - A Earth came into existence about 4.6 billion years ago from a large spinning cloud of gas and dust. |
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| 53. |
Experiment proof that organic compounds are the basis of evolution was given byA. OparinB. PasteurC. Miller and UreyD. Spallanzani |
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Answer» Correct Answer - C Experimental proof that organic compounds formed the basis of evolution was given by Miller and Urey. |
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| 54. |
Coacervates areA. Protobionts having polysaccharide+protein `+ H_(2)O`B. Protein aggregateC. Protein and lipid aggregatesD. None of these |
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Answer» Correct Answer - A Protoboints are prebiotic chemical aggregates having one or more properties of living system. Process of aggregation of organic molecules is called coacervation. It produced three types of protoboints - coacervates, microspheres and vesicles. Coacervates are reversible emulsoid aggregates consisting or protein and polysaccharide wtih some water. |
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| 55. |
The abiogenesis occurred about how many billion years agoA. 1.2 billionB. 1.5 billionC. 2.5 billionD. 3.5 billion |
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Answer» Correct Answer - D Abiogenesis or spotaneous creation of Autobiogenesis was proposed by von Helmont (1577-1644) and state that life originated abiogenetically from non living materials by spontaneous generation about 3.5 billion years ago. |
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| 56. |
The presence of salts (NaCl and others) in animal body fluid gives an inference that life originated in theA. Primitive oceanB. Rain water lakesC. Salt solutionD. All of the above |
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Answer» Correct Answer - A Presence of NaCl in body fluid indicates that life originated in primitive ocean. |
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| 57. |
Atmosphere of earth just before the origin of life consisted ofA. Water vapours, `CH_(2), NH_(3)` and OxygenB. `CO_(2), NH_(3)` and `CH_(4)`C. `CH_(4), NH_(3), H_(2)` and water vapoursD. `CH_(4), O_(3), O_(2)` and water vapours |
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Answer» Correct Answer - C Atmosphere of earth just before the origin of life consisted of `CH_(4), NH_(3), H_(2)` and water vapours. |
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| 58. |
About 4.6 billion years ago, the Earth consisted of a solid ___ and a gaseous ____ |
| Answer» Correct Answer - lithosphere , atmosphere | |
| 59. |
Life originated from earth’s inorganic atmosphere in past but not today. Suggest two reason. |
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Answer» i. Presence of free oxygen in present day atmosphere. ii. Existence of living organisms. |
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| 60. |
Which of the following statements is incorrect?A. Wings of insects and bats are homologousB. Wings of insects and bats are analogousC. Wings of bats and birds are homologousD. Wings of insects and birds are analogous |
| Answer» Correct Answer - A | |
| 61. |
The presence of salts (NaCl and others) in animal body fluid gives an inference that life originated in theA. Salt solutionB. Rain waterC. Primitive oceanD. None of the above |
| Answer» Correct Answer - C | |
| 62. |
According to one of the most accepted theory the earth atmosphere before any life had originated consisted of `H_(2)O, H_(2), NH_(2)` andA. `CH_(4)`B. `O_(2)`C. `N_(2)`D. None of these |
| Answer» Correct Answer - A | |
| 63. |
The extinct human ancestor, who ate only fruits and hunted with stone weapons wasA. AustralopithecusB. DryopithecusC. RamapithecusD. Homo habilis |
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Answer» Correct Answer - A Extinct human ancestor who ate only fruits and hunted with stone weapons was Australopithecus. |
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| 64. |
The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common environmental challenge is called `:`A. Non-random evolutionB. Adaptive radiationC. Natural selectionD. Convergent evolution |
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Answer» Correct Answer - D The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common environmental challenge, is called convergent evolution. |
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| 65. |
The tendency of population to remain in genetic equilibrium may be disturbed byA. Lack of migrationB. Lack of mutationsC. Lack of random matingD. Random mating. |
| Answer» Correct Answer - C | |
| 66. |
The tendency of population to remain in genetic equilibrium may be disturbed byA. lack of mutationB. lack of random matingC. random matingD. lack of migration |
| Answer» Correct Answer - B | |
| 67. |
The eye of octopus and eye of cat show different patterns of structure, yet they perform similar function. This is an example ofA. homologous organs that have evolved due 1o convergent evolutionB. homologous organs that have evolved due to divergent evolutionC. analogous organs that have evolved due to convergent evolutionD. analogous organs that have evolved due to divergent evolution |
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Answer» Correct Answer - C The analogous organs are not anatomically similar structures though they perform similar functions. Hence, analogous structures are a result of convergent evolution, i.e. different structures evolving for the same function and hence, having similarity. Therefore, the eyes of Octopus and eyes of cat are examples of analogous organs, though they are different in structure but similar in function. Homologous organs develop along different directions due to the adaptations to various needs. This is divergent evolution and the structures are homologous . |
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| 68. |
Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as Or Random unidirectional change in allele frequencies that occur by chance in all population and especially in small populations is known asA. Genetic loadB. Genetic flowC. Genetic driftD. Random mating |
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Answer» Correct Answer - C Genetic drift or Sewall Wright effect is an important mechanism in evolutionary change in small population. In a small population not all the alleles which are representative of that speciea may be present. Therefore, chance events may result in the elimination of that allele from population. |
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| 69. |
True/False Type Question: Ontogeny repeats phylogeny |
| Answer» Correct Answer - 1 | |
| 70. |
Flowering plants seem to have originated fromA. Chlorophyte ancestorsB. Tracheophyte ancestorsC. Rhynia type plantsD. Psilophytes |
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Answer» Correct Answer - D Flowering plants might have originated from psilophytes. |
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| 71. |
Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to asA. Random matingB. Genetic loadC. Genetic flowD. Genetic drift |
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Answer» Correct Answer - D Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as genetic drift. |
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| 72. |
The tendency of population to remain in genetic equilibriµrn may be disturbed byA. random matingB. lack of migrationC. lack of mutationsD. lack of random mating |
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Answer» Correct Answer - D According to Hardy-Weinberg principle, allele frequencies in a population are stable and is constant from generation to generation only if the following conditions are met. (i) There is no mutation, no gene flow and all mating is random. (ii) All genotypes reproduce equally well (i.e., no natural selection). But all there conditions are rarely met in nature |
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| 73. |
Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as Or Random unidirectional change in allele frequencies that occur by chance in all population and especially in small populations is known asA. genetic flowB. genetic driftC. random matingD. genetic load |
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Answer» Correct Answer - B Genetic drift is a random change in allele frequencies over the generations. It is brought by chance alone. Gene flow or gene migration is the physical movement of alleles into and out of a population |
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| 74. |
Analogous structures areA. Similar in originB. Similar in functionC. Non-functionalD. Similar in anatomy |
| Answer» Correct Answer - B | |
| 75. |
Which one of the following are analogous structures?A. Wings of Bat and Wings of PigeonB. Gills of Prawn and Lungs of ManC. Thorns of Bougainvilea and Tendrils of CucurbitaD. Flippers of Dolphin and Legs of Horse |
| Answer» Correct Answer - B | |
| 76. |
According of Darwin, the organic evolution is due toA. Competition within closely related speciesB. Reduced feeding efficiency in one species due to the presence of interfering speciesC. Intraspecific competitionD. Interspecific competition |
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Answer» Correct Answer - D According to Darwin, the organic evolution is due to interspeciic competition. |
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| 77. |
According of Darwin, the organic evolution is due toA. intraspecific competitionB. interspecific conpetitionC. competition within closely related speciesD. reduced feeding efficiency in one species due to the presence of interfering species |
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Answer» Correct Answer - B Darwin stated that the organic evolution is due to the interspecific competition. It is the competition between members of different species. Intraspecific competition occurs amongst members of the same species for obtaining optimum amounts of their food, shelter, mate, water, light, etc. Closely related species if compete cannot cause evolution. Reduced feeding efficiency in one species due to the presence of interfering species is due to the struggle for existence. |
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| 78. |
Which one of the following are analogous structuresA. Flippers of Dolphin and Legs of HorseB. Wings of Bat and wings of PigeonC. Gills of Prawn and Lungs of ManD. Thorns of Bougainvillea and Tendrils of Cucurbita |
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Answer» Correct Answer - B::C Both (2) and (3) are correct. Evolution by PK Gupta and Evolution by Ridley - Wings of insects, reptiles, birds and bats are believed to have developed independently and are analogous since they perform same function. As for Gills of Prawn and Lungs of Man, they are structurally different and functionally serve the same function, thus are analogous. |
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| 79. |
Atmosphere of the primitive earth was highly _____ while that of the present earth is highly ______. |
| Answer» Correct Answer - reducing , oxidizing | |
| 80. |
Fill in the Blanks. Atmosphere of the primitive earth was highly ….. While that of present earth is highly … |
| Answer» Correct Answer - reducing , oxidizing | |
| 81. |
Which of the following was likely to have been absent in a free molecules state , in the primitive atmosphere of the earth ?A. carbonB. OxygenC. HydrogenD. nitrogen |
| Answer» Correct Answer - B | |
| 82. |
According of Darwin, the organic evolution is due toA. Competition within closely ralated speciesB. Reduced feeding efficiency in one species due to the presence of interfering species.C. Intraspecific competitionD. Interspecific competition |
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Answer» Correct Answer - A According to Darwin Organic evolution is due to both interspecific and intraspecific competition. Moreover Competition between closely related species, means interspecific competition Thus option (a), (c) and (d) are all correct. CBSE has also taken all these three options as correct option. |
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| 83. |
The primitive atmosphere of earth contained water vapours, hydrogen, ammonia andA. `CO_(2)`B. OxygenC. NitrogenD. Methane |
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Answer» Correct Answer - D Pinna or ear may not be absolutely correct as 'muscles of pinna' have not been mentioned specifically in choice (2). Thus wisdom tooth becomes the best option. |
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| 84. |
a. Mention the specific geographical region where these organisms are found. b. Name and explain the phenomenon that has resulted in the evolution of such diverse species in the region. c. Explain giving reasons the existence of placental wolf and Tasmanian wolf sharing the same habitat. |
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Answer» a. Australia. b. Adaptive radiation (Divergent evolution) has resulted in this evolution. The process of evolution of different species in a given geographical area starting from a point and radiating to other areas of geography (habitats) is called adaptive radiation. It is the development of different functional structures from a common ancestral form. c. Placental wolf and Tasmanian wolf share similar habitat due to convergent evolution and evolved into unrelated group of organisms. |
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| 85. |
The correct sequence of the of the substances appearedduring the course of origin of life on earth was:A. glucose, amino acids, nucleic acids, proteinsB. ammonia, amino acids, proteins, nucleic acidsC. nucleotides, amino acids, nucleic acids, enzymesD. amino acids, ammonia, phosphates, nucleic acids |
| Answer» Correct Answer - A | |
| 86. |
Fossils contents of the alimentary canal are known as `:`A. castsB. trailsC. coprolitesD. impressions |
| Answer» Correct Answer - D | |
| 87. |
Organisms which obtain energy by the oxidation of reduced inorganic compounds are calledA. saprozoicB. chemoautotrophsC. photoautotrophsD. coproheterotrophs |
| Answer» Correct Answer - C | |
| 88. |
Apperance of dark-coloured peppered moths among the light-coloured ones as a result of increased industrial pollution is an example ofA. Disruptive selectionB. Stabilising selectionC. Directional selectionD. None of the above |
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Answer» Correct Answer - C Directional selection is the natural selection that favours the establishment of one particular advantageous mutation within a population, resulting in a change in phenotype in that direction. |
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| 89. |
State a reason for the increased population of dark coloured moths coinciding with the loss of lichens (on tree barks) during industrialisation period in England. |
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Answer» Natural selection or survival of fittest. |
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| 90. |
State a reason for the increased population of dark coloured moths coinciding with the loss of lichens (on the barks) during industrialization period in England. |
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Answer» Industrialization caused air pollution, produced excessive smoke and caused the darkening of tree trunks. Because in the dark coloured background the dark coloured moths could camouflage themselves they escape from predation and survived resulting in their increase in population. White winged moths were easily spotted by predators and eliminated. This is due to natural selection because dark coloured moths were better suited to the changed environment and thus survived |
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| 91. |
How did industrialization play a role in Natural selection of light and dark coloured moth in England. |
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Answer» Industrial melanism is an example of natural selection. Before industrialisation there were more white winged moth on trees than darkwinged. After industrialisation due to industrial smoke and soot, tree trunks became dark because light coloured moth survived by hiding among white coloured lichens and the dark coloured moth were easily spotted and picked by predators. Under this condition the white winged moths did not survive, due to predation. And dark coloured moth survive/able to camouflage to survive. This supports the only principle of natural selection that only those that can better adapt are fit and survive and increase in population size. |
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| 92. |
Evolutionary development of a species can be best studied byA. DNA analysisB. Finding age by carbon datingC. Studying fossils of this speciesD. All of these |
| Answer» Correct Answer - C | |
| 93. |
Which Statement best explains the evolutionary advantage of meiosis?A. Meiosis is necessary for sexual reproductionB. Genetic recombinations are possible from generation to generationC. Meiosis aftermates with mitosis for generation to generationD. The same genetic system is passed on from generation to generation. |
| Answer» Correct Answer - B | |
| 94. |
Refer to the given figure and select the correct option regarding it. A. `{:(P,Q,R,S),("Chlorophyte ancestors","Traceophyte ancestors","Rhynia-type plants","Psilophyton"):}`B. `{:(P,Q,R,S),("Tracheophyte ancestors","Rhynia type plants","Chrolophyte ancestors","Psilophyton"):}`C. `{:(P,Q,R,S),("Chlorophyte ancestors","Tracehophyte ancestors","Psilophyton","Rhynia-type plants"):}`D. `{:(P,Q,R,S),("Chlorophyte ancestors","Rhynia-type plants","Traceophyte ancestors","Psilophyton"):}` |
| Answer» Correct Answer - A | |
| 95. |
Fossil found in Mandla district of MP isA. 260 million years oldB. 100 million years oldC. 50 million years oldD. 20 million years old |
| Answer» Correct Answer - B | |
| 96. |
The theory of natural selection was given byA. LamrackB. Alfred WallceC. Charles DarwinD. Oparin and Haldane. |
| Answer» Correct Answer - C | |
| 97. |
Which of the following statements is related to kari Emst von Baer?A. Embryos never pass through the adult stages of other animals.B. comparative anatomy shows differences among organisms of today and those that existed years ago.C. Certain features during embryonic stages are common to all vertebrates that are absent in adult.D. Ontogeny repeats phylogeny. |
| Answer» Correct Answer - A | |
| 98. |
List three characteristics that always provide a selective advantage. |
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Answer» i. self-defense ii. reproductive success iii. food gathering ability |
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| 99. |
Refer to the given figure and select the correct option regarding X,Y and Z. A. `{:(X,Y,Z),("Brachioaurus","Archaeopteryx","Triceratops"):}`B. `{:(X,Y,Z),("Archaeopteryx","Tryannosaurus","Pteranodon"):}`C. `{:(X,Y,Z),("Archaeopteryx","Stgosaurus","Tryrannosaurus"):}`D. `{:(X,Y,Z),("Archaeopteryx","Brachiosaurus","Triceratops"):}` |
| Answer» Correct Answer - B | |
| 100. |
Who discovered the fossil of archaeopteryx from bavaria (Germany)A. Thomas HuxleyB. Hermann von MeyerC. Colin HarrisonD. Andreas Wagner |
| Answer» Correct Answer - D | |