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. |
A large regional unit characterised by vegetation type and associated fauna found in a specific climatic zone is called:A. ecosystemB. biological communityC. biomeD. habitat |
| Answer» Correct Answer - C | |
| 52. |
A large regional unit characterised by vegetation type and associated fauna found in a specific climatic zone is called:A. BiomeB. BiosphereC. EcosystemD. Landscape |
| Answer» Correct Answer - A | |
| 53. |
Ecology is study of relationships ofA. Members of a familyB. Man and environmentC. Organisms and environmentD. Soil and water |
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Answer» Correct Answer - C Ecology is study of relationship of organism and environment. |
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| 54. |
Which one is the famous plant ecologist of India?A. Charles DrawinB. Ramdeo MisraC. Birbal SahaniD. Jagdish Chandra Bose |
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Answer» Correct Answer - B Ramdev Misra isthe famour plant ecologist of India |
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| 55. |
Actively moving organisms in aquatic ecosystem areA. BenthosB. ZooplanktonC. PhytoplanktonD. Nekton |
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Answer» Correct Answer - D Actively moving organisms in aquatic ecosystem are nekton. |
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| 56. |
Which one of the following biomes is dominated by gymnosperm or conifer trees (pines, firs, spruces)?A. TaigaB. TundraC. DesertD. Broad-leaved forest |
| Answer» Correct Answer - A | |
| 57. |
Humus is good for plant growth becauseA. improves physical condition of soil.B. makes the soil porousC. increases water holding and aeration of soilD. All of the above |
| Answer» Correct Answer - D | |
| 58. |
Humus isA. Dead and decayed organic matterB. Living matterC. FertilizersD. Living animal/plants/microbes |
| Answer» Correct Answer - A | |
| 59. |
Mull humus is characterized byA. Nutrient deficiencyB. Layered compositionC. `Ca^(+2)` deficiencyD. Rich bacterial growth |
| Answer» Correct Answer - D | |
| 60. |
In an area, a population with large size individuals having long life span, more parental care and slow development was present. The type of population growth curve will beA. S-shapedB. J-shapedC. Z-shapedD. All of these |
| Answer» Correct Answer - A | |
| 61. |
Humus is formed inA. horizon-AB. horizon-OC. horizon-BD. horizon-C |
| Answer» Correct Answer - B | |
| 62. |
Population density of terrestrial organisms is measured in terms of individual per :A. `"metre"^(3)`B. `"metre"^(4)`C. meterD. `"meter"^(2)` |
| Answer» Correct Answer - D | |
| 63. |
The following diagrams show possible ways of population dispersion . Which one of the following is the most common pattern of dispersion of individuals in a population?A. XB. YC. ZD. X and Y |
| Answer» Correct Answer - A | |
| 64. |
Which of the following are correct ? I. Population is group of individual organisms of the same species in a given area. II. An ecotype is a population of inidividuals of a species, which are genetically different. III. Environment is influnced by many biotic and abiotic factors. IV. Ecade is a place, where and organism lives.A. Only IIIB. I and IIIC. I and IID. I, II and III |
| Answer» Correct Answer - D | |
| 65. |
A high density of elephant population in an area can result inA. intra-specific competitionB. inter-specific competitionC. predation on one anotherD. mutualism |
| Answer» Correct Answer - A | |
| 66. |
A high density of elephant population in an area can result inA. Predation on one anotherB. MutualismC. Intra specific competitionD. Inter specific competition |
| Answer» Correct Answer - C | |
| 67. |
To determine the density of a population you would need ot know the number of individual andA. the factors tha limit population growthB. their birth rateC. the size of the area, in which they liveD. their population growth rate |
| Answer» Correct Answer - C | |
| 68. |
Who showed that even a glow growing animal like elephant could reach enormous numbers in the absence of checks?A. DarwinB. LamarckC. WallaceD. Both A and C |
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Answer» Correct Answer - A Darwin showed that even a slow growing animal like elephant could reach enormous numbers in the absence of checks. |
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| 69. |
For calculating the intrinsic rate of natural increase, one can need to know theA. B and DB. B, D, I and EC. B, b, D and dD. b and d |
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Answer» Correct Answer - D For calculating the intrinsic rate of natural increase, one can need to know the b(birth rates) and d(death rates0. |
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| 70. |
Ecologists suggest that life history trait of organisms have evolved in relation to the constraints imposed by theA. Biotic componentsB. Abiotic componentsC. Both biotic and abiotic componentsD. None of the above |
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Answer» Correct Answer - C Ecologist suggest that life history traits of organism have evolved due to constraint imposed by the abiotic components and biotic component of their habitat in which they live. |
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| 71. |
Relation between viceroy butterfly and monarch butterfly is that ofA. camouflageB. Mullerian mimicryC. Batesian mimicryD. warning colouration |
| Answer» Correct Answer - C | |
| 72. |
Assertion : Viceroy butterfly mimics Monarch butterfly . Reason : Monarch butterfly is toxic and unpalatable .A. If both A and R are true and R is the correct explanation of A .B. If both A and R are true but R is not the correct explanation of A .C. If A is true but R is false .D. If both A and R are are false . |
| Answer» Correct Answer - A | |
| 73. |
The Ophrys is pollinated by the phenomenon of theA. CamouflagingB. MimicryC. Resource partitioningD. Parasitism |
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Answer» Correct Answer - B a) An orchid resembling the female of an insect so as to be able to get pollinated is due to phonomenon of mimicry. b) One petal of its flower bear an uncanny resemblance to the female of bee in size, colour and markings. The male bee in size, colour and markings. The male bee attracted to what it perceives as a female, pseudocopulates with the flower and during that process is dusted with pollen from the flower, it transfers pollen to it and thus pollinates the flower. |
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| 74. |
A biologist studied the population of rats in a barn. He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in populations is :A. 15B. `05`C. zeroD. 10 |
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Answer» Correct Answer - C Net increase in population : (Natality + Immigration) - (Mortality + Emigration) (250 + 20) - (240 + 30) 270 - 270 = 0 |
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| 75. |
Mangrove of marshy sunderbans is characterised byA. pneumatophoresB. prop rootsC. viviparyD. All of these |
| Answer» Correct Answer - D | |
| 76. |
Edge effect refers toA. Occurrence of ecophenes and ecotypes in a communityB. Low diversity of organisms in ecotoneC. High diversity of organisms in ecotoneD. Defense of territories by organisms |
| Answer» Correct Answer - C | |
| 77. |
Biotic potential refers toA. Increase of population under optimum conditionsB. Increase of population under given conditionsC. Increase of population under natural conditionsD. Increase of population under stress conditions |
| Answer» Correct Answer - A | |
| 78. |
(A) : A biotic community comprises several interdependent species. (R) : A biotic community is always dependent on either plants or animals.A. If both A and R are true and R is the correct explanation of A .B. If both A and R are true but R is not the correct explanation of A .C. If A is true but R is false .D. If both A and R are are false . |
| Answer» Correct Answer - A | |
| 79. |
The number of species per unit number of individuals of a biotic community is calledA. abundanceB. frequencyC. diversityD. density |
| Answer» Correct Answer - B | |
| 80. |
Biotic potential isA. Intrinsic rate of natural increase under environmental limited conditionB. Intrinsic rate of natural increase under environmental limited conditionsC. Entrinsic rate of natural increase under environmental limited conditionsD. Entrinsic rate of natural increase under environmental unlimited conditions |
| Answer» Correct Answer - B | |
| 81. |
Assertion: Biotic community has higher position than population in ecological hierarchy. Reason: Population of similar individuals remains isolated in the community.A. If both assertion and reason are true and the reason is a correct explanation of the assertion.B. If both assertion and reason are true but reason is not a correct explanation of the assertion.C. If the assertion is true but reason is false.D. If both the assertion and reason are false. |
| Answer» Correct Answer - C | |
| 82. |
Which of the following is/are an angiospermic hydrophyte?A. HydrillaB. VallisneriaC. ZizyphusD. Both A and B |
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Answer» Correct Answer - D Hydrilla and Vallisneria are an angiospermic hydrophyte. |
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| 83. |
Vivipary and prop roots are the characteristics ofA. Coastal plantsB. Hot desert plantsC. Mangrove plantsD. Cold desert plants |
| Answer» Correct Answer - C | |
| 84. |
Hydrophyte with both hydrophytic and xerophytic traits isA. AgaveB. NeriumC. VallisneriaD. None of these |
| Answer» Correct Answer - D | |
| 85. |
Give two alternate terms for biotic community . |
| Answer» Biocoenosis , multispecies population . | |
| 86. |
Name two artificial biotic communities . |
| Answer» Aquarium , pot of house plants . | |
| 87. |
Which of the following characters does not characterize a hydrophyte?A. A bundant air space and air chambersB. A bundant xylem and sclerenchymaC. Leaves having stomata only on upper side or noneD. Poor development of roots |
| Answer» Correct Answer - B | |
| 88. |
How nature controls aphid infestation of plants ? |
| Answer» By lady bird beetles such as Coccinella. | |
| 89. |
An internal mechanism in organisms that controls the periodicity of biological phenomenons is known asA. biological clockB. biological spectrumC. biological successionD. None of the above |
| Answer» Correct Answer - A | |
| 90. |
Plants are killed in the winter by frostA. Because of desiccation and mechanical damages to the tissuesB. Because no photosynthesis takes place at such low temperatureC. Because respiration ceases at such low temperatureD. Because there is no transpiration |
| Answer» Correct Answer - A | |
| 91. |
Name any two free floating hydrophytes . |
| Answer» Correct Answer - Lemna Wolffia . | |
| 92. |
Which of the following forest plants controls the light conditions at the ground?A. Lianas and climbersB. ShrubsC. Tall treesD. Herbs |
| Answer» Correct Answer - C | |
| 93. |
Ephemerals are xeropytes that areA. Drought enduringB. Drought escapingC. Drought resistingD. None of these |
| Answer» Correct Answer - B | |
| 94. |
Give two examples each of the following : (i) Ephemerals (drought escapers) (ii) Succulents (drought resistants) (iii) Free floating hydrophytes (iv) Submerged floating hydrophytes (v) Mangrove plants |
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Answer» (i) Euphorbia prostata , Argimone maxicana (ii) Opuntia , Asparagus (also Euphorbia ) (iii) Lemna , Wolffia (also Pistia , Trapa) (iv) Ceratophylum , Utricularia (v) Avicennia Aegiatillis |
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| 95. |
What are ephemerals ? |
| Answer» Xerophytes which evade dry conditions . | |
| 96. |
Ephemerals are a type of xerophytes, which areA. drought-escapingB. drought-resistingC. drought-enduringD. None of the above |
| Answer» Correct Answer - A | |
| 97. |
Xerophytes are mostlyA. succulentsB. water relatedC. mesophytesD. none of these |
| Answer» Correct Answer - A | |
| 98. |
Aerenchyma occurs inA. EpiphytesB. halophytesC. HydrophytesD. Xerophytes |
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Answer» Correct Answer - C Aerenchyma occurs in hydrophytes. |
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| 99. |
Association between Barnacles and whale/Limulus isA. SymbiosisB. CommensalismC. ParasitismD. Predatorship |
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Answer» Correct Answer - B Association between Barnacles and whale Limulus is commensalim. |
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| 100. |
Which one is not a trait of xerophytes:A. BrassicaB. CuscutaC. CapparisD. Hydrilla |
| Answer» Correct Answer - C | |