Environment & Biodiversity MCQs
Environment, Ecology & Biodiversity Multiple choice questions for GK paper in SSC, NDA, CDS, UPSC, UPPSC and State PSC Examinations.
21. Tropical rain forests –
[A] Does not shed leaves
[B] Have a particular leaves’ shedding period
[C] Shed leaves but does not have particular season
[D] Shed leaves twice in a year
Show Answer
Correct Answer: C [Shed leaves but does not have particular season]
Notes:Tropical rain forest occur near the equator and are marked by high temperature and rainfall. Thus flora is diversified and rich. Because of almost perennial presence of humidity the trees shed leaves but does not have a particular shedding period.
22. Which of the following can not be classified as biotic factors?
[A] Mineral in the soil
[B] Microorganisms
[C] Fossil Fuels
[D] Plants
Show Answer
Correct Answer: A [Mineral in the soil]
Notes:Biotic resources are those resources that comes from living and organic matters. They include both living and once living. Thus minerals are abiotic components and microorganisms and fossil fuels are biotic components.
23. Which of the following can can categorised as the point source of water pollution?
- Oil spill in sea form ship
- Discharge from houses connected to public sewerage system
- Drains
- Nuclear Reactors
Select the correct answer form the codes given below-
[A] 1,2,3,4
[B] 1,3 and 4 only
[C] 1, 2 and 4 only
[D] 1,2 and 3 only
Show Answer
Correct Answer: B [1,3 and 4 only]
Notes:
Point sources of water pollution are those sources which are identifiable and thus easily controlled. Since drains, oil spill from ships and release form nuclear reactor can be easily identified so they are point source of water pollution.
24. Which of the following is true about Tiger Reserves in India
- Melghat in Maharashtra is the smallest Tiger reserve
- Nagarjuna- Sriselam Tiger Reserve is the largest tiger reserve in India
Select the correct answer from the codes given below-
[A] 1 only
[B] 2 only
[C] Both 1 & 2
[D] Neither 1 nor 2
Show Answer
Correct Answer: B [2 only]
Notes:
Nagarjuna- Sriselam Tiger Reserve in Telangana is the largest tiger reserve in India while Bor tiger reserve of Maharashtra is the smallest Tiger reserve.
25. Which of the following is true about Sulpher Dioxide?
- It is a colourless gas with strong odour
- It is used as a food preservative.
Select the correct answer from the codes given below-
[A] 1 only
[B] 2 only
[C] Both
[D] None
Show Answer
Correct Answer: C [Both]
Notes:
Sulpher dioxide is a colourless and odourless has. Though found naturally 99% comes from human sources. It is a pollutant and major component of smog. It is used as a food preservative thus a person can be exposed through ingestion.
26. Which of the following are the benefits of chlorine treatment of water?
- Remove suspended partticles
- Remove hardness of water
- Kill germs
Select the correct answer from the codes given below-
[A] 1,2,3 only
[B] 1 and 3 only
[C] 2 and 3 only
[D] 1 and 2 only
Show Answer
Correct Answer: A [1,2,3 only]
Notes:
Contaminated water is treated with chlorine which removes suspended solid particles in water, remove the hardness of water and kill germs.
27. Which of the following is true about Golden Langur?
- In India it is found only in North East India
- Its IUCN status is Endangered
Select the correct answer from the codes given below:
[A] 1 only
[B] 2 only
[C] Both
[D] None
Show Answer
Correct Answer: C [Both]
Notes:
Golden Langur also called Gee’s Golden Langur is one of the primates found in the the foothills of Bhutan (North), Manas river (East), Sankosh river (West), and Brahmaputra river (South). Its IUCN status is Endangered.
28. Which of the following statements are correct about aquatic ecosystems?
1. In an aquatic ecosystem, phytoplanktons are the primary producers.
2. Phytoplanktons are eaten by zoo planktons which is eaten by fishes and fishes are eaten by pelicans.
Select the correct option from the codes given below:
[A] Only 1
[B] Only 2
[C] Both 1 & 2
[D] Neither 1 & 2
Show Answer
Correct Answer: C [Both 1 & 2]
Notes:
In an aquatic ecosystem, phytoplanktons are the primary producers. Phytoplanktons are eaten by zoo planktons which is eaten by fishes and fishes are eaten by pelicans.
29. Which of the following is vital for the production of carbohydrates through photosynthesis by plants?
[A] Nitrogen
[B] Carbon
[C] Sulphur
[D] None of the above
Show Answer
Correct Answer: B [Carbon]
Notes:
Carbon is a minor constituent of the atmosphere, however, without carbon dioxide life wasn’t possible, because it is vital
for the production of carbohydrates through photosynthesis by plants.
30. Consider the following statements regarding the Indian Estuarine Ecosystem:
- India has 14 major, 44 medium and 162 minor rivers drains into the sea through various estuaries.
- Major estuaries occur in the Bay of Bengal.
- Estuaries on the west coast are smaller.
Which of the above statements is/are correct?
[A] Only 1 and 2
[B] Only 2 and 3
[C] Only 1 and 3
[D] All Are Correct Statements
Show Answer
Correct Answer: D [All Are Correct Statements]
Notes:
India does have 14 major, 44 medium and 162 minor rivers that drain into the sea through various estuaries. Major estuaries do occur in the Bay of Bengal. Additionally, estuaries on the west coast are smaller. Therefore, all statements are correct.
