Environment and Ecology
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Environment and Ecology questions with answers

2,222 multiple-choice questions. Open any question for its answer and explanation.

Questions asked in State PSC and UPSC prelims, by topic. Each topic also has notes to read.

Read the notes: Ecology →

  1. Loss of water is maximum fromAsked in WBCS Main Paper 4 2019
  2. Which of the following is not a part of nitrogen cycle ?Asked in JUNIOR ACCOUNTANT AND TRA 2013
  3. Which of the following biogeochemical cycles involve all of the processes mentioned below : Condensation, Melting, Transpiration, Evaporation, FreezingAsked in Protection Officer 2018
  4. Which of the following processes is not a contributor to the release of carbon dioxide in the carbon cycle?Asked in COMPUTER PROGRAMMER 2019
  5. Which one of the following is most sensitive to environmental change?Asked in UPSC CDS 2 2016
  6. An ecotone generally refers to the:Asked in UPSC Geoscientist 2021
  7. Which one of the following results due to the 'edge effect' between cold and warm ocean waters?Asked in UPSC Geoscientist 2022
  8. The transitional area between two living organisms is known asAsked in MPSC CS Prelims 2018
  9. Some species if eliminated seriously affect the ecosystem. These are calledAsked in MPSC CS Prelims 2023
  10. Keppel Island is completely bleached mainly due to the expansion ofAsked in UPSC NDA 1 2021
  11. Transition zone between two ecosystems is calledAsked in PPSC CS Prelims 2015
  12. A transition zone between two biological communities is referred to as :Asked in UKPSC CS Prelims 2021
  13. Within biological communities, some species are important in determining the ability of a large number of other species to persist in the community. Such species are calledAsked in UPPCS Prelims 2000
  14. The area that acts as a boundary or a transition zone between two ecosystems is known asAsked in MPPSC CS Prelims 2022
  15. What is ecotone?Asked in Agriculture Development Officer 2021
  16. Which one of the following is NOT correctly matched? Crop - Weed (a) Wheat - Phalaris minor (b) Paddy - Bathua (c) Pea - Piyazi (d) Berseem - KasniAsked in RO ARO 2020
  17. The actual location or place where an organism lives is calledAsked in BPSC Prelims Exam 65th
  18. Halophytes are the plants that grow on which one, among the following categories of soil ?Asked in UPSC CDS 2 2024
  19. Gause`s competitive exclusion principle states that two species:Asked in UPSC Geoscientist 2020
  20. The term 'biotope' refers toAsked in UPSC Geoscientist 2022
  21. An ecological “Niche” can be defined as __________.Asked in KPSC KAS Prelims 2017
  22. What is ecological amplitude?Asked in UPSC Geoscientist 2023
  23. Which one of the following term describes not only the physical space occupied by an organism, but also its functional role in the community of organisms?Asked in OPSC CS Prelims 2023 · UPSC IAS 2013
  24. The process of establishment of an organism in a new habitat is known asAsked in TNPSC CS Prelims 2022
  25. Which of the following is concerned with soil?Asked in UPPCS Prelims 2018