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Environment & EcologyHardAsked in: UPSC Civil Services · CSE Prelims 2019, GS Paper I

Consider the following pairs : (Wildlife) (Naturally found in) 1. Blue-finned Mahseer : Cauvery River 2. Irrawaddy Dolphin : Chambal River 3. Rusty-spotted Cat : Eastern Ghats Which of the pairs given above are correctly matched?

  1. A.1 and 2 only
  2. B.2 and 3 only
  3. C.1 and 3 only
  4. D.1,2 and 3

Correct answer

C. 1 and 3 only

Explanation

The correct answer is C, 1 and 3 only. The blue-finned mahseer occurs in the Cauvery and the rusty-spotted cat in the Eastern Ghats, but the Irrawaddy dolphin does not live in the Chambal.

The blue-finned mahseer is a large game fish of the Cauvery river system in southern India, where anglers and conservationists have long studied mahseer populations. The Irrawaddy dolphin lives in coastal waters, estuaries and lagoons; in India it is best known from Chilika Lake in Odisha and the Sundarbans. The Chambal, a protected river for the gharial, is home instead to the Ganges river dolphin, India's National Aquatic Animal. The rusty-spotted cat, among the smallest wild cats in the world, is found in dry deciduous forests across peninsular India, including the Eastern Ghats.

A is wrong: pair 2 is incorrect.

B is wrong: pair 2 is incorrect and pair 1 is correct.

D is wrong: the Irrawaddy dolphin pair is not correct.

Exam tip: Irrawaddy dolphin = Chilika and Sundarbans; Ganges dolphin = Chambal and Ganga; rusty-spotted cat = smallest wild cat of India.

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Q1.Environment & EcologyAsked in: CDS · CDS-II 2018, GKEasy

Which one of the following statements with regard to growth of coral reefs is not correct?

  1. A.Coral can grow abundantly in freshwater.
  2. B.It requires warm water between 23 °C-25 °C.
  3. C.It requires shallow saltwater, not deeper than 50 metres.
  4. D.It requires plenty of sunlight to aid photosynthesis.
Show answer
Correct answer: A. Coral can grow abundantly in freshwater.

Reef-building corals are marine animals and die in fresh water, so this statement is false. Corals are tiny polyps that build skeletons of calcium carbonate and live with algae called zooxanthellae inside their tissues.

Q2.Environment & EcologyAsked in: CDS · CDS-I 2024, GKEasy

Which one of the following biosphere reserves is spread over three States in India?

  1. A.Nilgiri
  2. B.Achanakmar-Amarkantak
  3. C.Seshachalam
  4. D.Agasthyamalai
Show answer
Correct answer: A. Nilgiri

The Nilgiri Biosphere Reserve spreads across Tamil Nadu, Kerala and Karnataka. Set up in 1986, Nilgiri was India's first biosphere reserve, and in 2000 it became the first Indian reserve on UNESCO's World Network of Biosphere Reserves.

Q4.Environment & EcologyAsked in: UPSC CAPF · CAPF 2017, Paper IEasy

Which one of the following is NOT decomposed by bacterial action ?

  1. A.Vegetable remains
  2. B.Plastic materials
  3. C.Animal carcasses
  4. D.Wastes of flowers
Show answer
Correct answer: B. Plastic materials

Ordinary plastics are non-biodegradable, so bacteria and fungi cannot break them down in any useful length of time. Most plastics, such as polyethylene, polypropylene and PVC, are long synthetic polymers made from petroleum.

Q5.Environment & EcologyAsked in: UPSC Civil Services · CSE Prelims 2024, GS Paper IEasy

According to the Environmental Protection Agency (EPA), which one of the following is the largest source of sulphur dioxide emissions?

  1. A.Locomotives using fossil fuels
  2. B.Ships using fossil fuels
  3. C.Extraction of metals from ores
  4. D.Power plants using fossil fuels
Show answer
Correct answer: D. Power plants using fossil fuels

The EPA names the burning of fossil fuels by power plants and other industrial facilities as the largest source of sulphur dioxide.