Ecosystem MCQs Quiz Multiple Choice Questions & Answers

1. The term Ecology was coined by

1. A.G.Tansley
2. Earnst Haeckel
3. Aristotle
4. Linnaeus

2. The conversion of ammonia to nitrate is known as ............................

1. ammonification
2. nitrification
3. denitrification
4. all of these

3. Organisms which depened on Producers for nutrition are called

1. Autotrophs
2. Saprophytes
3. Consumers
4. Xerophytes

4. The inherent ability of organisms to reproduce and multiply is called

1. C value
2. biotic potential
3. carrying capacity
4. K value

5. An example of one way ecological cycle is

1. carbon dioxide cycle
2. water cycle
3. energy cycle
4. oxygen cycle

6. The animal which consumes decaying organic matter is ............................

1. Carnivore
2. Detritivore
3. Herbivore
4. Producers

7. Sulphur bacteria are examples of

1. Carnivores
2. Heterotrophs
3. Saprophytes
4. Autotrophs

8. ............................ is an example of bottom feeders.

1. Cat fish
2. Frog
3. Snake
4. Tadpole

9. The largest brackish water lake situated in Asia is in Orissa. Which is the lake?

1. Chilka lake
2. Vembanad lake
3. Woolar lake
4. Dal lake

10. The presence of which is necessary for photosynthesis

1. Chloroform
2. Chlorophyll
3. Phosphorus
4. Polymer

11. Nitrogen fixing blue green alga

1. Clostridium
2. Rhizobium
3. Nostoc
4. Nitrosomonas

12. Which one is natures cleaner?

1. Consumers
2. Producers
3. Decomposers and Scavengers
4. Symbionts

13. Autotrophs are ............................

1. Consumers
2. Herbivores
3. Saprophytes
4. Producers

14. What is desertification?

1. Conversion of forests into desert
2. Conversion of croplands into desert
3. Conversion of grassland into desert
4. all of the above

15. Ramsar Convention refers to the conservation of ............................

1. Deserts
2. Wetlands
3. Agriculture lands
4. Forest land

16. Rain during November is more acidic than monsoon rain due to

1. dissolved CO2
2. dissolved SO2
3. dissolved NO2
4. none of the above.

17. The word Biophilia was coined by

1. Dr. Hackel
2. Dr. Johanssen
3. Dr. Benjamine
4. E. O. Wilson

18. An ecosystem gradually merges with an adjoining one through a transitional zone is called the ............................

1. Ecological niche
2. ecological footprint
3. ecotone
4. shore effect

19. Study of inter-relationship between organisms and their environment is

1. Ecology
2. Ecosystem
3. Phytogeography
4. Ethology

20. The phenomenon of occurrence of additional species found in the ecotone or transitional zone between adjoining ecosystems is known as ............................

1. Edge effect
2. Root effect
3. Raman effect
4. Coolidge effect

21. The term Eco implies

1. Environment
2. Ecotone
3. Ecotourism
4. Soil

22. ............................ trees shed their leaves during winter and hot summer.

1. ever green
2. coniferous
3. deciduous
4. Shola

23. Forests grow in high rain fall areas are

1. ever green forests
2. temperate forests
3. conifers
4. Tundra

24. The forests which occur in law rain fall area is

1. Evergreen forests
2. deciduous forests
3. Coniferous forest
4. all the above

25. A set of organisms that resemble one another in appearance and behavior is called a ............................

1. Exons
2. Prions
3. Species
4. guilds

26. When number of food chains is interlocked this is called

1. food link
2. food chain
3. food web
4. pyramid

27. Complex interlinked food chains are called

1. Food Web
2. Food net work
3. Trophic levels
4. Food pyramid

28. All the genes of a population is called

1. gene pool
2. genome
3. gene bunch
4. gene population

29. The first trophic level in a food chain

1. Green Plants
2. Herbivores
3. Carnivores
4. Bacteria

30. The species that flower are called

1. gymnosperms
2. bryophytes
3. angiosperms
4. algae

31. The Primary Consumers are also called as

1. Herbivores
2. Carnivores
3. Enzymes
4. None of these

32. Green plants are absent in deep sea. Why?

1. Light is absent
2. High pressure
3. Low temperature
4. Great depth

33. Gas released during photosynthesis is

1. Methane
2. Nitrogen
3. Oxygen
4. Carbon dioxide

34. What is Plankton?

1. Microscopic floating organisms – Plants and animals.
2. bottom dwelling aquatic organisms
3. large plants in water
4. none

35. The area to which a species is biologically adapted to live is known as ............................

1. Niche
2. Habitat
3. Succession
4. Community

36. The source of atmospheric oxygen is

1. Nitrogen cycle
2. Green Plants
3. Water
4. Carbon Cycle

37. Nitrogen gas returns to the atmosphere by the action of

1. Nitrogen fixing bacteria
2. Denitrifying bacteria
3. Nitrifying bacteria
4. Nitrate fertilizers

38. Which is an example for sedimentary biogeochemical cycle

1. Oxygen cycle
2. Nitrogen cycle
3. Water cycle
4. Phosphorus cycle

39. North American grassland are called

1. Pampas
2. Prairies
3. Savannah
4. None

40. An example of an abiotic component

1. Plants
2. Soil
3. Animals
4. Bacteria

41. An example of lotic system

1. Pond
2. River
3. Lake
4. Reservoir

42. African grasslands are called

1. Prairies
2. Pampas
3. Savannah
4. None

43. Favorable morphological and physiological response to a change in environment is called

1. Preadaptation
2. Ecotyping
3. Formation of ecophenes
4. Acclimatisation

44. The relationship between nitrogen fixing bacteria and leguminous plants is an example for Parasitism

1. Predation
2. Mutualism
3. Commensalism
4. Symbiosis

45. Sedimentation is a

1. Primary water treatment
2. Secondary water treatment
3. Tertiary water treatment
4. Final process

46. A Hawk that eats a frog is a

1. Producer
2. Primary Consumer
3. Secondary Consumer
4. Tertiary Consumer

47. Photosynthesis is found in

1. Producers
2. Decomposers
3. Consumers
4. Scavengers

48. Phytoplankton are

1. Producers of forest
2. Producers of lakes
3. Consumers of Ocean
4. Omnivores

49. What is deep ecology?

1. Protecting nature for its own sake
2. Ecology of deep sea
3. Ecology of forest
4. Ecology of caves

50. An example of nitrogen fixing bacteria in the soil

1. Rhizobium
2. Nostoc
3. Azotobacter
4. Nitrobacter