Quiznetik

Environmental Science and Ecology | Set 1

1. Ecology deals with the study of:

Correct : C. Reciprocal relationship between living and non living components

2. Autecology deals with

Correct : A. Ecology of species

3. Synecology deals with

Correct : C. Ecology of community

4. Ecotype is a type of species in which environmentally induced variations are

Correct : B. Genetically fixed

5. The term ‘Biocoenosis’ was proposed by

Correct : B. Carl Mobius

6. The pyramid of energy in any ecosystem is

Correct : A. Always upright

7. Energy flow in ecosystem is

Correct : A. Unidirectional

8. An ecosystem must have continuous external source of

Correct : B. energy

9. The source of energy in an ecosystem is

Correct : B. Sunlight

10. Trophic levels are formed by

Correct : D. Organisms linked in food chain

11. Biotic potential is counteracted by

Correct : D. None of the above

12. Definition of ecosystem is

Correct : A. The community of organisms together with the environment in which they live

13. In a food chain of grassland ecosystem the top consumers are

Correct : B. Carnivorous

14. MAB stands for

Correct : A. Man and biosphere

15. Species that occur in different geographical regions separated by special barrier are:

Correct : A. Allopatric

16. Which one is true?

Correct : B. symbiosis when the interaction is useful to both the populations

17. A high density of elephant population in an area can result in

Correct : B. Intraspecific competition

18. Barnacles growing on the back of whale is an example for

Correct : D. commensalism

19. Pencillium does not swallow the growth of bacterium Staphylococcus. This sort of relationship is called

Correct : C. amensalism

20. Symbiosis is shown by

Correct : A. E.coli

21. When both partners are affected negatively the nature of interaction is

Correct : B. competition

22. An association between two individuals or populations where both are benefitted and where neither can survive without the other is

Correct : C. mutualism

23. Which of the following interactions will not promote co evolution?

Correct : A. commensalism

24. The effect of interspecific competition on niches is to make them

Correct : B. smaller

25. Mycorrhiza represents

Correct : D. symbiotic association between a fungus and roots of higher plants .

26. The pioneers in xerach succession is the

Correct : A. crustose lichen

27. The final stable community in an ecological succession is called the

Correct : C. climax community

28. The process of successful establishment of the species in a new area is called

Correct : D. ecesis

29. The formation of a climax community from an abandoned farm land is a an example of

Correct : D. secondary succession

30. Succession initiated on large sand deposits or deserts is called

Correct : B. psammosere

31. The development of a bare area without any life form is called

Correct : A. nudation

32. The conversion of a pond to a climax forest community is an example of

Correct : C. hydrarch succession

33. The intermediate developmental stages in the ecological succession is called

Correct : A. sere

34. All the statements are correct regarding ecological succession except

Correct : A. It is a random process

35. The order of succession in a lithosere or xerosere is

Correct : B. Crustose lichen stage->Foilose lichen stage->moss stage->herb stage->shrub stage->forest stage (climax community)

36. The order of succession in a hydrosere is

Correct : D. phytoplankton->Rooted aquatic plants->Free floating stage->Reedswamp stage->Sedge Meadow stage-> wood land stage-> Climax forest

37. The pyramid of numbers is inverted in the case of

Correct : A. parasitic food chain

38. The concept of ecological pyramid was first proposed by

Correct : D. Charles Elton

39. The pyramid of energy in terrestrial ecosystem is

Correct : A. upright

40. Which of the following ecological pyramid is always upright?

Correct : A. Pyramid of energy

41. The pyramid of numbers in a single tree is

Correct : C. spindle shaped

42. A graphic representation of number of individuals of different species belonging to each trophic level in a an ecosystem is known as

Correct : C. pyramid of number

43. The pyramid of biomass is inverted in

Correct : C. fresh water ecosystem

44. In pond ecosystem, the pyramid of biomass is

Correct : B. inverted

45. In grassland ecosystem, the pyramid of biomass is

Correct : A. upright

46. Which of the following statement is incorrect regarding ecological pyramids

Correct : A. The pyramid of energy is inverted in ocean ecosystem

47. Organisms having the potential for interbreeding and producing fertile offspring is called

Correct : D. Species

48. A group of individuals of a plant or animal species, inhabiting a given area is called

Correct : B. Population

49. Climate includes

Correct : D. All of these

50. The maintenance of relatively constant internal environment is called

Correct : A. Homeostasis

51. Ultraviolet radiation which is not lethal but harm to the organism is

Correct : B. 0.28-0.32 µm

52. Ecological niche of an organism represents

Correct : D. all of these

53. Respiratory roots are known as

Correct : B. pneumatophores

54. The gradual physiological adjustment to slowly changing new environmental conditions is known as

Correct : C. Acclimatization

55. Upper layer of water in a single body of water is known as

Correct : B. Epilimnion

56. The lower limit of water availability is soil is known as

Correct : D. wilting point

57. MAB program stands for

Correct : D. Man and Biosphere

58. Red data book contains data of

Correct : D. threatened species

59. IUCN (The International Union For Conservation Of Nature And Natural Resources) headquarters is at

Correct : A. Morges, Switzerland

60. IUCN is also called as

Correct : B. World Conservation Union

61. Which of the following region has maximum diversity

Correct : D. coral reefs

62. Approximately, 50% of total world species are present on

Correct : A. tropical rain forest

63. Biodiversity

Correct : A. increases towards the equator

64. The most important reason for decrease in biodiversity is

Correct : D. habitat destruction

65. Dodo is

Correct : D. extinct

66. Blue whale is placed under

Correct : A. endangered

67. Conservation within the natural habitat is

Correct : A. insitu conservation

68. All are insitu conservation efforts except

Correct : C. Zoo

69. Ex situ conservation includes

Correct : D. all of the above

70. Hot spots are regions of high

Correct : B. endemism

71. Endemic species are

Correct : B. species localised in a specific region

72. What is the animal symbol of W. W. F (World Wildlife Fund) ?

Correct : B. Giant Panda

73. The most important human activity, leading to the extinction of wildlife, is

Correct : D. Alternation and destruction of the natural habitats

74. If we uncover half of the forest, covering of the earth, what crisis will be produced at most and at first?

Correct : A. Some species will be extincted

75. When is the World Wildlife week ?

Correct : C. First week of October

76. Red Data Book Provides data on

Correct : D. Endangered plants and animals

77. Wild life is continuously decreasing. What is the main reason of this?

Correct : C. Destruction of habitat

78. What is the major cause of diminishing wildlife number?

Correct : C. Habitat destruction

79. Viable material of endangered species can be preserved by

Correct : A. Gene bank

80. Which group of vertebrates comprises the highest number of endangered species?

Correct : A. Mammals

81. Which of the following is mainly responsible for the extinction of wild life

Correct : D. All of these

82. The unfavourable alteration of environment due to human activities is termed as

Correct : D. pollution

83. Which of the following is the best indicator of SO2 pollution

Correct : C. Lichen

84. Heavy dust can cause

Correct : C. closure of stomata

85. Which of the following is the major cause of pollution

Correct : D. hydrocarbon gases

86. Minamata disease was caused by pollution of water by

Correct : A. mercury

87. BOD stands for

Correct : C. biological oxygen demand

88. A river with high BOD value is

Correct : A. highly polluted

89. 5th June is observed as

Correct : B. world environment day

90. Cement factory labourers are prone to

Correct : D. cytosilicosis

91. Noise is measured using sound meter and the unit is

Correct : B. decibel

92. The undesirable change in physical, chemical or biological characteristics of air, land and water is referred as

Correct : C. pollution

93. Which of the radioactive material is largely associated with bone cancer

Correct : C. Strontium-90

94. Lead poisoning

Correct : A. reduces O2 carrying capacity of haemoglobin in blood

95. Acid rain contains

Correct : C. both a and b

96. The occurrence of pesticides like DDT in higher trophic levels is termed as

Correct : B. biomagnification

97. Earth summit was held in

Correct : B. Rio de Jeneiro in 1992

98. All are physical pollutants except

Correct : D. soot

99. All are primary pollutants except

Correct : B. Peroxy Acyl Nitrate (PAN)

100. Pollutants that are introduced into the environment by human activity are called as

Correct : A. qualitative pollutants