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Biology MCQS[NEET-2021 to 2022]-Ecology mcq for competitive exams

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1. Which one of the following types organisms occupy more than one trophic level in a ecosystem




2. Afforestation should be with .




3. Renewable exhaustible natural resource of energy is




4. Which can be tropic level of a lion in from ecosystem?




5. Wildlife is destroyed most when




6. Maximum human population can be supported if all the humans are




7. Dominant plants of cold desert are




8. If all the plants are to die, all the animals will also die due to deficiency of




9. Each successive trophic level has




10. Sunderbans contain mainly




11. It is not a protected forest




12. In grassland ecosystem, the number of primary producers is about 6 million. The number of top carnivore supported by it would be




13. Energy transfer from organisms to organism in a natural community develops




14. Biomass produced by plants in oceans accounts for




15. Phytoplankton are dominant in




16. Antimalarial drug quinine is got from




17. Forest which is never leafless




18. An organisms contains carbon molecules which have passed through three levels of ecosystem, the organisms is




19. Ecological efficiency is




20. Land mass occupied by forest is about




21. In nitrification ammonia is first oxidized to nitrite by




22. energy flow in ecosystem is...




23. which one of the following is one of the characteristic of a biological community?




24. which of the following is an example of man made ecosystem?




25. These belong to the category of primary consumers




26. which one of the following pairs in mismatched?




27. which is the reason for highest biomaas in aquatic ecosystem?




28. identify the correct type of food chain: dead animal=blow fly maggots= common frog= snake




29. which one of the following is correct matching of a plant, its habit and the forest type where it normally occurs?




30. Littoral zone is located along the




31. Which one of the following correctly represents an organism and its ecological niche?




32. In a lake, phytoplankton grow in abundance in




33. Actively moving organism in aquatic ecosystem




34. Which of the following is primary consumer?




35. Deserts, grasslands, forests and tundra are the examples of




36. Which one of the following is commonly found in temperate coniferous forest?




37. Plant species having a wide range of genetical distribution evolve into a local population known as




38. Which of the following is expected to have the highest value (gm/m2/yr) in a grassland ecosystem?




39. Niche is defined as the




40. The rate of formation of new organic matter by rabbit in a grassland, is called




41. The correct sequence of plants in a hydrosere is




42. Which one of the following is a wrong statement?




43. In an area where DDT had been used extensively, the population of birds declined significantly because




44. dB is a standard abbreviation used for the quantitative expression of




45. Identify the correctly matched pair




46. Common indicator organism of water pollution is:




47. Shell of egg in bird becomes thin (not properly formed) due to the pollution of pesticides. This is due to interference in the activity of :




48. Lichens can be used as :




49. Industrial melanism is an example of