Environmental Studies MCQ : Set-02

MCQ Questions On Environmental Studies .

Answer are given in Bold highlight .

1. A group of living organisms of the same kind living in the same place and at the same time refers to a

1. Community .
2. Species .
3. Population .
4. Consumers .

2. Which of these organisms has a diet consisting only of plant matter .

1. Omnivores .
2. Carnivores .
3. Herbivores .
4. Insectivores .

3. The true end of any food chain is the

1. Decomposer .
2. Predator .
3. Consumer .
4. Human .

4. The second trophic level in a lake is

1. Phytoplankton  .
2. Zooplanktons
3. Fishes .
4. Benthos .

5. Which of the following can act as a pioneer species in a xerach succession .

1. Lichens .
2. Humans .
3. Herbs .
4. Animals .

6. Energy flow in an ecosystem is

1. Bidirectional .
2. Unidirectional .
3. Multidirectional .
4. All rounds .

7. Which of the following is an example of a man-made ecosystem

1. Tissue culture .
2. Herbarium .
3. Aquarium .
4. Forest .

8. Pyramid of energy in a pond ecosystem is always

1. Inverted .
2. Upright .
3. Linear .
4. Irregular .

9. If in a population, natality is balanced by mortality, then there will be

1. Decrease in population growth .
2. Increase in population growth .
3. Zero population growth .
4. Over population .

10. In a pyramid of numbers in grassland ecosystems, the largest population is that of

1. Herbivores .
2. Primary consumers .
3. Secondary consumer .
4. Producers .

11. Which of these belong to the category of primary consumers in grazing food chain .

1. snakes and frogs .
2. Insects and cattle .
3. Eagle and snakes .
4. Cow and rabbit

12. The pyramid of energy is always upright for any ecosystem, this situation indicates that

1. Herbivores have better energy conversion efficiency than carnivores .
2. Producers have the lowest energy conversion efficiency .
3. Carnivores have a better energy conversion efficacy than herbivores .
4. Energy conversion efficiency is same at all trophic levels .

13. Which of the ecological pyramid is always upright

1. Pyramid of numbers .
2. Pyramid of biomass .
3. Pyramid of energy .
4. All of the above .

14. Which of these organisms has a diet consisting only of plant matter

1. Omnivores .
2. Carnivores .
3. Herbivores .
4. Insectivores .

15. The true end of any food chain is the

1. Decomposer .
2. Predator .
3. Consumer .
4. Human .

16. The second trophic level in a lake is

1. Phytoplankton .
2. Zooplanktons .
3. Fishes .
4. Benthos .

17. Which of the following can act as a pioneer species in a xerach succession

1. Lichens .
2. Humans .
3. Herbs .
4. Animals .

18. Energy flow in an ecosystem is

1. Bidirectional.
2. Unidirectional .
3. Multidirectional .
4. All rounds .

19. Which of the following is an example of a man-made ecosystem

1. Tissue culture .
2. Herbarium .
3. Aquarium .
4. Forest .

20. Pyramid of energy in a pond ecosystem is always

1. Inverted .
2. Upright .
3. Linear .
4. Irregular .

21. A product of photosynthesis is

1. Carbon dioxide .
2. Water .
3. Oxygen .
4. Chlorophyll .

22. Primary source of energy in a food web is/are

1. Green plants .
2. Sun .
3. Inorganic nutrients .
4. Animals .

23. A group of living organisms of the same kind living in the same place and at the same time refers to a

1. Community.
2. Species .
3. Population .
4. Consumers .

24. Which of these organisms has a diet consisting only of plant matter

1.  Omnivores .
2. Carnivores .
3. Herbivores .
4. Insectivores .

25. The true end of any food chain is the

1. Decomposer .
2. Predator .
3. Consumer .
4. Human

26. The second trophic level in a lake is

1. Phytoplankton .
2. Zooplanktons.
3. Fishes .
4. Benthos .

27. Which of the following can act as a pioneer species in a xerach succession

1. Lichens .
2. Humans .
3. Herbs .
4. Animals .

28. Energy flow in an ecosystem is

1. Bidirectional .
2. Unidirectional .
3.  Multidirectional .
4. All rounds .

29. Which of the following is an example of a man-made ecosystem

1. Tissue culture .
2. Herbarium .
3. Aquarium .
4. Forest .

30. Pyramid of energy in a pond ecosystem is always

1. Inverted .
2. Upright .
3. Linear .
4. Irregular .

31. If in a population, natality is balanced by mortality, then there will be

1. Decrease in population growth .
2. Increase in population growth  .
3. Zero population growth .
4. Over population .

32. In a pyramid of numbers in grassland ecosystems, the largest population is that of

1. Herbivores .
2. Primary consumers .
3. Secondary consumer .
4. Producers .

33. Which of these belong to the category of primary consumers in grazing food chain

1. snakes and frogs .
2. Insects and cattle.
3. Eagle and snakes .
4. Cow and rabbit .

34. The pyramid of energy is always upright for any ecosystem, this situation indicates that

1. Herbivores have better energy conversion efficiency than carnivores .
2. Producers have the lowest energy conversion efficiency .
3. Carnivores have a better energy conversion efficacy than herbivores .
4. Energy conversion efficiency is same at all trophic levels

35. Which of the ecological pyramid is always upright

1. Pyramid of numbers .
2. Pyramid of biomass .
3. Pyramid of energy .
4. All of the above

36. Which one of the following is not a gaseous biogeochemical cycle

1. Nitrogen cycle .
2. Carbon cycle .
3. Sulphur cycle .
4. Phosphorus cycle

37. Deserts, grasslands, forests and tundra regions are the examples of

1. Biomes .
2. Biogeographically regions .
3. Ecosystems .
4. Biospheres .

38. The upright pyramid of numbers is absent in

1. Lake .
2. Pond .
3. Grasslands .
4. Forests .

39. The final stable community in ecological succession is

1. Climax .
2. Pioneer .
3. Sere .
4. Carnivores .

40. Mass of living matter at a trophic level in an area at any given time is called

1. Standing state .
2. Standing crop .
3. Humus .
4. Detritus .

41. Hydrarch succession takes place in

1. Dry areas .
2. Bare area .
3. Wetter areas .
4. None of the above .

42. Which of the following is a fossil fuel ?

1. Oil .
2. Coal  .
3. Natural gas .
4. All of the above .

43. Which of the following is not an inexhaustible form of energy ?

1. Water .
2. Wind .
3. Solar .
4. Fossil .

44. Biogas contains mainly

1. Methane .
2. Propane .
3. Butane .
4. Carbon dioxide .

45. The burning of fossil fuels releases a large amount of

1. Nitrogen into air .
2. Sulphur into air .
3. Carbon dioxide into air .
4. Oxygen into air .

46. A poisonous gas given out of a vehicle exhaust is

1. Methane .
2. Ethane .
3. Carbon dioxide .
4. Carbon monoxide .

47. The purest form of coal is

1. Anthracite .
2. Lignite .
3. Peat .
4. Bitumen .

48. Which one of the following is used as a refrigerant ?

1. Freon .
2. Teflon .
3. Ethanol .
4. Benzol .

49. Loss of forest has led to

1. Erosion of fertile soil .
2. Global warming .
3. Loss of habitat of plants and animals .
4. All of the above .

50. What are the consequences of excessive mining in an area ?

1. Air and water pollution .
2. Deforestation .
3. Migration of large numbers of population .
4. All of the above .

51. Study of trends in human population growth and prediction of future growth is called

1. Demography .
2. Psychology .
3. Biography .
4. Kalography .

52. One of the critical mechanism by which the environment controls population of species is

1. Spread of disease .
2. Removal of excreta .
3. Supply of food .
4. Control on death rate .

53. If the rate of addition of new member’s increases with respect to the individual lost of the same population, then the graph obtained has

1. Decline growth  .
2. Zero growth .
3. Exponential growth .
4. None of these .

54. The number of babies produced per thousand individuals is called

1. Natality .
2. Mortality .
3. Immigration .
4. Emigration .

55. The zero population growth due to equal birth and death rates is called

1. Fertility rate .
2. Replacement level .
3. Natural increase .
4. Demographic transition 

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