Environmental Science and Ecology GK online MCQ practice set

Q21. When both partners are affected negatively the nature of interaction is

A. commensalism
B. competition
C. predation
D. amensalism

Q22. 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

Q23. Which of the following interactions will not promote coevolution?

A. commensalism
B. mutualism
C. parasitism
D. interspecific competition

Q24. The effect of interspecific competition on niches is to makethem

A. larger
B. smaller
C. more triangular
D. change location

Q25. 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 .

Q26. The pioneers in xerach succession is the

A. crustose lichen
B. mosses
C. foliose lichen
D. shrubs

Q27. The final stable community in an ecological succession is calledthe

A. final community
B. ultimate community
C. climax community
D. seral community

Q28. The process of successful establishment of the species in a new area is called

A. sere
B. climax
C. invasion
D. ecesis

Q29. The formation of a climax community from an abandoned farmland is a an example of

A. Autogenic succession
B. allogenic successsion
C. primary succession
D. secondary succession

Q30. Succession initiated on large sand deposits or deserts is called

A. hydrosere
B. psammosere
C. xerosere
D. oxylosere

Q31. The development of a bare area without any life form is called

A. nudation
B. ecesis
C. sere
D. reaction

Q32. 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

Q33. The intermediate developmental stages in the ecological succession is called

A. sere
B. ecesis
C. climax
D. nudation

Q34. 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

Q35. 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)

Q36. 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

Q37. The pyramid of numbers is inverted in the case of

A. parasitic food chain
B. Grassland ecosystem
C. Forest ecosystem
D. lake ecosystem

Q38. The concept of ecological pyramid was first proposed by

A. E.P. Odum
B. A.G. Tansley
C. Juday
D. Charles Elton

Q39. The pyramid of energy in terrestrial ecosystem is

A. upright
B. inverted
C. spindle shaped
D. irregular

Q40. 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