McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Uncategorized topics , Union Public Service Commission (UPSC) .
| 1. |
Ecology deals with the study of: |
| A. | Living beings |
| B. | Living and non living components |
| C. | Reciprocal relationship between living and non living components |
| D. | Environment |
| Answer» C. Reciprocal relationship between living and non living components | |
| 2. |
Autecology deals with |
| A. | Ecology of species |
| B. | Ecology of many species |
| C. | Ecology of community |
| D. | All the above |
| Answer» A. Ecology of species | |
| 3. |
Synecology deals with |
| A. | Ecology of many species |
| B. | Ecology of many populations |
| C. | Ecology of community |
| D. | None of the above |
| Answer» C. Ecology of community | |
| 4. |
Ecotype is a type of species in which environmentally induced variations are |
| A. | Temporary |
| B. | Genetically fixed |
| C. | Genetically not related |
| D. | None of the above |
| Answer» B. Genetically fixed | |
| 5. |
The term ‘Biocoenosis’ was proposed by |
| A. | Transley |
| B. | Carl Mobius |
| C. | Warming |
| D. | None of the above |
| Answer» B. Carl Mobius | |
| 6. |
The pyramid of energy in any ecosystem is |
| A. | Always upright |
| B. | May be upright or invented |
| C. | Always inverted |
| D. | None of the above |
| Answer» A. Always upright | |
| 7. |
Energy flow in ecosystem is |
| A. | Unidirectional |
| B. | Bidirectional |
| C. | Multidirectional |
| D. | None of the above |
| Answer» A. Unidirectional | |
| 8. |
An ecosystem must have continuous external source of |
| A. | minerals |
| B. | energy |
| C. | food |
| D. | All of the above |
| Answer» B. energy | |
| 9. |
The source of energy in an ecosystem is |
| A. | ATP |
| B. | Sunlight |
| D. | N.A |
| Answer» B. Sunlight | |
| 10. |
Trophic levels are formed by |
| A. | Only plants |
| B. | only animals |
| C. | Only carnivorous |
| D. | Organisms linked in food chain |
| Answer» D. Organisms linked in food chain | |
| 11. |
Biotic potential is counteracted by |
| A. | Competition with other organisms |
| B. | Producer is the largest |
| C. | Limitation of food supply |
| D. | None of the above |
| Answer» D. None of the above | |
| 12. |
Definition of ecosystem is |
| A. | The community of organisms together with the environment in which they live |
| B. | The abiotic component of a habitat |
| C. | The part of the earth and its atmosphere which inhibits living organisms |
| D. | A community of organisms interacting with one another |
| Answer» 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 |
| A. | Herbivorous |
| B. | Carnivorous |
| C. | Bacteria |
| D. | Either carnivorous or herbivorous |
| Answer» B. Carnivorous | |
| 14. |
MAB stands for |
| A. | Man and biosphere |
| B. | Man, antibiotics and bacteria |
| C. | Man and biotic community |
| D. | Mayer, Anderson and Bisby |
| Answer» A. Man and biosphere | |
| 15. |
Species that occur in different geographical regions separated by special barrier are: |
| A. | Allopatric |
| B. | Sympatric |
| C. | Sibling |
| D. | None of the above |
| Answer» A. Allopatric | |
| 16. |
Which one is true? |
| A. | symbiosis when neither population affects each other |
| B. | symbiosis when the interaction is useful to both the populations |
| C. | commensalism when none of the interacting populations affect each other |
| D. | commensalism when the interaction is useful to both the populations |
| Answer» B. symbiosis when the interaction is useful to both the populations | |
| 17. |
A high density of elephant population in an area can result in |
| A. | mutualism |
| B. | Intraspecific competition |
| C. | Interspecific competition |
| D. | Predation on one another |
| Answer» B. Intraspecific competition | |
| 18. |
Barnacles growing on the back of whale is an example for |
| A. | mutualism |
| B. | parasitism |
| C. | amensalism |
| D. | commensalism |
| Answer» D. commensalism | |
| 19. |
Pencillium does not swallow the growth of bacterium Staphylococcus. This sort of relationship is called |
| A. | commensalism |
| B. | predation |
| C. | amensalism |
| D. | mutualism |
| Answer» C. amensalism | |
| 20. |
Symbiosis is shown by |
| A. | E.coli |
| B. | Cuscuta |
| C. | Rafflesia |
| D. | Monotropa |
| Answer» A. E.coli | |
| 21. |
When both partners are affected negatively the nature of interaction is |
| A. | commensalism |
| B. | competition |
| C. | predation |
| D. | amensalism |
| Answer» B. competition | |
| 22. |
An association between two individuals or populations where both are benefitted and where neither can survive without the other is |
| A. | competition |
| B. | commensalism |
| C. | mutualism |
| D. | protocoperation |
| Answer» C. mutualism | |
| 23. |
Which of the following interactions will not promote co evolution? |
| A. | commensalism |
| B. | mutualism |
| C. | parasitism |
| D. | interspecific competition |
| Answer» A. commensalism | |
| 24. |
The effect of interspecific competition on niches is to make them |
| A. | larger |
| B. | smaller |
| C. | more triangular |
| D. | change location |
| Answer» B. smaller | |
| 25. |
Mycorrhiza represents |
| A. | symbiotic association between a fungus and liverworts |
| B. | parasitic association between a fungus and an alga |
| C. | parasitic association between a fungus and roots of plants |
| D. | symbiotic association between a fungus and roots of higher plants . |
| Answer» D. symbiotic association between a fungus and roots of higher plants . | |
| 26. |
The pioneers in xerach succession is the |
| A. | crustose lichen |
| B. | mosses |
| C. | foliose lichen |
| D. | shrubs |
| Answer» A. crustose lichen | |
| 27. |
The final stable community in an ecological succession is called the |
| A. | final community |
| B. | ultimate community |
| C. | climax community |
| D. | seral community |
| Answer» C. climax community | |
| 28. |
The process of successful establishment of the species in a new area is called |
| A. | sere |
| B. | climax |
| C. | invasion |
| D. | ecesis |
| Answer» D. ecesis | |
| 29. |
The formation of a climax community from an abandoned farm land is a an example of |
| A. | Autogenic succession |
| B. | allogenic successsion |
| C. | primary succession |
| D. | secondary succession |
| Answer» D. secondary succession | |
| 30. |
Succession initiated on large sand deposits or deserts is called |
| A. | hydrosere |
| B. | psammosere |
| C. | xerosere |
| D. | oxylosere |
| Answer» B. psammosere | |
| 31. |
The development of a bare area without any life form is called |
| A. | nudation |
| B. | ecesis |
| C. | sere |
| D. | reaction |
| Answer» A. nudation | |
| 32. |
The conversion of a pond to a climax forest community is an example of |
| A. | xerarch succession |
| B. | mesarch succession |
| C. | hydrarch succession |
| D. | all of these |
| Answer» C. hydrarch succession | |
| 33. |
The intermediate developmental stages in the ecological succession is called |
| A. | sere |
| B. | ecesis |
| C. | climax |
| D. | nudation |
| Answer» A. sere | |
| 34. |
All the statements are correct regarding ecological succession except |
| A. | It is a random process |
| B. | Species diversity increases as succession proceeds |
| C. | The food chain relationships becomes more complex |
| D. | The role of decomposers becomes more and more important |
| Answer» A. It is a random process | |
| 35. |
The order of succession in a lithosere or xerosere is |
| A. | Foliose lichen stage->Crustose lichen stage->moss stage->herb stage->shrub stage->forest stage (climax community) |
| B. | Crustose lichen stage->Foilose lichen stage->moss stage->herb stage->shrub stage->forest stage (climax community) |
| C. | Moss stage ->Foilose lichen stage-> Crustose lichen stage ->herbstage->shrub stage->forest stage (climax community) |
| D. | Crustose lichen stage->Foilose lichen stage->moss stage-> ->shrubstage-> herb stage->forest stage (climax community) |
| Answer» 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 |
| A. | Rooted aquatic plants-> phytoplankton->Free floating stage->Reedswamp stage->Sedge Meadow stage-> wood land stage-> Climax forest |
| B. | Rooted aquatic plants-> phytoplankton->Free floating stage-> SedgeMeadow stage-> Reed swamp stage-> wood land stage-> Climax forest |
| C. | phytoplankton->Rooted aquatic plants->Free floating stage->Reedswamp stage-> wood land stage-> Sedge Meadow stage-> Climax forest |
| D. | phytoplankton->Rooted aquatic plants->Free floating stage->Reedswamp stage->Sedge Meadow stage-> wood land stage-> Climax forest |
| Answer» 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 |
| A. | parasitic food chain |
| B. | Grassland ecosystem |
| C. | Forest ecosystem |
| D. | lake ecosystem |
| Answer» A. parasitic food chain | |
| 38. |
The concept of ecological pyramid was first proposed by |
| A. | E.P. Odum |
| B. | A.G. Tansley |
| C. | Juday |
| D. | Charles Elton |
| Answer» D. Charles Elton | |
| 39. |
The pyramid of energy in terrestrial ecosystem is |
| A. | upright |
| B. | inverted |
| C. | spindle shaped |
| D. | irregular |
| Answer» A. upright | |
| 40. |
Which of the following ecological pyramid is always upright? |
| A. | Pyramid of energy |
| B. | Pyramid of number |
| C. | Pyramid of biomass |
| D. | none of these |
| Answer» A. Pyramid of energy | |
| 41. |
The pyramid of numbers in a single tree is |
| A. | upright |
| B. | inverted |
| C. | spindle shaped |
| D. | none of these |
| Answer» 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 |
| A. | ecological pyramid |
| B. | pyramid of biomass |
| C. | pyramid of number |
| D. | pyramid of energy |
| Answer» C. pyramid of number | |
| 43. |
The pyramid of biomass is inverted in |
| A. | forest ecosystem |
| B. | grassland ecosystem |
| C. | fresh water ecosystem |
| D. | tundra |
| Answer» C. fresh water ecosystem | |
| 44. |
In pond ecosystem, the pyramid of biomass is |
| A. | upright |
| B. | inverted |
| C. | spindle shaped |
| D. | none of these |
| Answer» B. inverted | |
| 45. |
In grassland ecosystem, the pyramid of biomass is |
| A. | upright |
| B. | inverted |
| C. | spindle shaped |
| D. | none of these |
| Answer» A. upright | |
| 46. |
Which of the following statement is incorrect regarding ecological pyramids |
| A. | The pyramid of energy is inverted in ocean ecosystem |
| B. | The pyramid of biomass is inverted in aquatic ecosystem |
| C. | The pyramid of numbers is upright in grass land ecosystem |
| D. | The pyramid of biomass is upright in grass land ecosystem |
| Answer» A. The pyramid of energy is inverted in ocean ecosystem | |
| 47. |
Organisms having the potential for interbreeding and producing fertile offspring is called |
| A. | Class |
| B. | Order |
| C. | Genus |
| D. | Species |
| Answer» D. Species | |
| 48. |
A group of individuals of a plant or animal species, inhabiting a given area is called |
| A. | Biome |
| B. | Population |
| C. | Ecosystem |
| D. | Community |
| Answer» B. Population | |
| 49. |
Climate includes |
| A. | Seasonal variation |
| B. | General patterns of atmosphere conditions |
| C. | Average weather of an area |
| D. | All of these |
| Answer» D. All of these | |
| 50. |
The maintenance of relatively constant internal environment is called |
| A. | Homeostasis |
| B. | Exotherms |
| C. | Homeobox |
| D. | Endotherms |
| Answer» A. Homeostasis | |
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