UPSC CSE (Prelims) · General Studies

Environment, Ecology and Biodiversity

18 practice questions, each with the answer and an explanation.

Practise Environment, Ecology and Biodiversity now

Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 18 questions

  1. With reference to 'Blue Carbon', which of the following statements is correct?
  2. Consider the following statements regarding the 'Ramsar Convention':
    1. It is the only global environmental treaty that deals with a particular ecosystem.
    2. Montreux Record is a register of wetland s…
  3. In the context of ecosystem dynamics, what does the term 'Ecotone' best describe?
  4. Consider the following statements about 'Bio-accumulation' and 'Biomagnification':
    1. Bioaccumulation refers to an increase in pollutant concentration in an individual organism over time.
    2. Biomagnif…
  5. Which of the following National Parks in India is renowned for being the only floating national park in the world?
  6. Consider the following greenhouse gases:
    1. Carbon Dioxide (CO2)
    2. Methane (CH4)
    3. Nitrous Oxide (N2O)
    4. Sulphur Hexafluoride (SF6)

    Which of the following represents their correct order of Global…
  7. With reference to the 'Kunming-Montreal Global Biodiversity Framework (GBF)', what is target '30 by 30'?
  8. The term 'M-STrIPES' is sometimes seen in the news in the context of:
  9. Which of the following is/are recognized ecological services provided by wetlands?
    1. Water purification through retention of sediments and nutrients
    2. Flood attenuation and aquifer replenishment
    3.…
  10. Consider the following statements regarding the 'Red Data Book':
    1. It is published by the International Union for Conservation of Nature (IUCN).
    2. It categorizes species into categories such as Exti…
  11. Why is the presence of 'Lichens' in an urban area considered a reliable biological indicator of air quality?
  12. Consider the following statements regarding 'Biochar':
    1. It is produced by thermal decomposition of biomass in the absence or limited presence of oxygen (pyrolysis).
    2. It can significantly enhance s…
  13. In which one of the following states is the 'Dehing Patkai National Park' situated?
  14. What is 'Ocean Acidification' primarily caused by?
  15. Consider the following organisms:
    1. Corals
    2. Phytoplankton
    3. Cyanobacteria

    Which of the above are capable of primary production?
  16. Consider the following statements regarding biochemical cycles and marine ecology:

    1. Biological nitrogen fixation converts atmospheric dinitrogen () into ammonia () catalyzed by the nitro…
  17. With reference to the Global Environment Facility (GEF), it serves as a financial mechanism for which of the following international environmental conventions? 1. Convention on Biological Diversity (C…
  18. Which of the following National Parks in India is unique in being a swamp with floating decomposed vegetation (locally called 'Phumdis') that supports a rich biodiversity?

Keep practising

More UPSC CSE (Prelims) topics

All UPSC CSE (Prelims) practice →

Ready for the full UPSC CSE (Prelims) test?

Take a mock testUPSC CSE (Prelims) hub