Envis Centre, Ministry of Environment & Forest, Govt. of India

Printed Date: Monday, February 6, 2023


1. The use of microorganism metabolism to remove pollutants such as oil spills in the water bodies is known as:


[A] Biomagnification

[B] Bioremediation 

[C] Biomethanation

[D] Bioreduction




2. The largest number of Tiger Reserves are located in:


[A] Karnataka

[B] Andhra Pradesh

[C] Madhya Pradesh 

[D] West Bengal




3. The Siberian Crane, an endangered migratory bird is a regular visitor of which of the following national park/bird sanctuaries:


[A] Ranganathittu bird sanctuary

[B] Keoladeo national park 

[C] Vedanthangal bird sanctuary

[D] Sultanpur bird sanctuary




4. Which of the following Indian States/UT has the maximum percentage of mangrove cover in the country?


[A] Gujarat

[B] West Bengal

[C] Andaman and Nicobar

[D] Orissa




5. In an ecotone, the species which become abundant are called:


[A] Edge species 

[B] Keystone species

[C] Endemic species

[D] Foster species




6. The word ‘ecology’ (Ökologie) was coined in 1866 by:


[A] Charles Darwin

[B] Robert Whittaker

[C] Arthur Tansley

[D] Ernst Haeckel 




7. Which of the following statements is NOT true?


[A] Photochemical smog always contains Ozone.

[B] The toxic effect of Carbon Monoxide is due to its greater affinity for haemoglobin as compared to oxygen.

[C] Lead is the most hazardous metal pollutant of automobile exhaust.

 [D] None of the above 




8. Identify the non Green-House Gas (GHG) from the following :


[A] Methane

[B] Nitrous Oxide

[C] Sulphur Hexafluoride

[D] Carbon Monoxide 




9. The highest per capita emitter of Carbon dioxide in the world is:


[A] US

[B] China

[C] Qatar 

[D] Saudi Arabia




10. Which of the following is not among the four coral reef regions of India identified by the Government for intensive conservation and management?


[A] Gulf of Mannar

[B] Gulf of Khambat 

[C] Lakshadweep Islands

[D] Andaman and Nicobar Islands




11. The relationship between water fern Azolla and cyanobacterium Anabaena is:


[A] Symbiotic 

[B] Mutualistic

[C] Commensalism

[D] Proto-Cooperation




12. Which one of the following is a useful biological indicator of Sulphur-dioxide pollution?


[A] Bryophytes

[B] Algal blooms

[C] Pseudomonas

[D] Lichens 




13. In Nitrogen Cycle, soil nitrates are transformed into free nitrogen by:


[A] Nitrifying bacteria

[B] Denitrifying bacteria 

[C] Ammonifying bacteria

[D] Both [A] and[C]




14. An aquatic plant introduced from America to check pollution turned out to be a troublesome weed in Indian water bodies. The name of this ‘invasive alien species’ is:


[A] Opuntia

[B] Aegilops

[C] Eichhornia  

[D] Pistia




15. ‘Lion-tailed macaque’ is the key faunal species of which Biosphere Reserve?


[A] Nilgiri 

[B] Dehang-Debang

[C] Dibru-Saikhowa

[D] Nokrek




Source: http://www.gktoday.in