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TNPSC Group 2 Environment & Ecology — practice questions

Explore 68 free Environment & Ecology questions in TNPSC Group 2 Environment. Open each question or exercise to read its content, reference answers and available explanation.

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Environment & Ecology questions and exercises with answers

Showing questions 1–30 of 68.

Consider the following: I. Cigarette butts II. Eyeglass lenses III. Car tyres How many of them contain plastic?Read the answer and worked solution →Artificial way of causing rainfall to reduce air pollution makes use ofRead the answer and worked solution →Which one of the following shows a unique relationship with an insect that has coevolved with it and that is the only insect that can pollinate this tree?Read the answer and worked solution →Which one of the following is the exhaust pipe emission from Fuel Cell Electric Vehicles, powered by hydrogen ?Read the answer and worked solution →Which one of the following makes a tool with a stick to scrape insects from a hole in a tree or a log of wood?Read the answer and worked solution →Among the following crops, which one is the most important anthropogenic source of both methane and nitrous oxide?Read the answer and worked solution →Which of the following is not a bird?Read the answer and worked solution →The “Miyawaki method” is well known for the:Read the answer and worked solution →Which one of the following has been constituted under the Environment (Protection) Act, 1986?Read the answer and worked solution →Certain species of which one of the following organisms are well known as cultivators of fungi?Read the answer and worked solution →What is blue carbon?Read the answer and worked solution →Which one of the following is used in preparing a natural mosquito repellent?Read the answer and worked solution →Which one of the following is a filter feeder?Read the answer and worked solution →In case of which one of the following biogeochemical cycles, the weathering of rocks is the main source of release of nutrient to enter the cycle?Read the answer and worked solution →With reference to India, Didwana, Kuchaman, Sargol and Khatu are the names ofRead the answer and worked solution →Among the following, which one is the least water-efficient crop?Read the answer and worked solution →'Triclosan', considered harmful when exposed to high levels for a long time, is most likely present in which of the following?Read the answer and worked solution →With reference to India's biodiversity, Ceylon frogmouth, Coppersmith barbet, Gray-chinned minivet and White-throated redstart areRead the answer and worked solution →Among the following Tiger Reserves, which one has the largest area under "Critical Tiger Habitat"?Read the answer and worked solution →Which one of the following National Parks lies *completely* in the temperate alpine zone?Read the answer and worked solution →In the context of which one of the following are the terms 'pyrolysis and plasma gasification' mentioned?Read the answer and worked solution →The word 'Denisovan' is sometimes mentioned in media in reference toRead the answer and worked solution →"Momentum for Change : Climate Neutral Now" is an initiative launched byRead the answer and worked solution →In which one of the following States is Pakhui Wildlife Sanctuary located?Read the answer and worked solution →Biological Oxygen Demand (BOD) is a standard criterion forRead the answer and worked solution →If you want to see gharials in their natural habitat, which one of the following is the best place to visit?Read the answer and worked solution →The term 'M-STrIPES' is sometimes seen in the news in the context ofRead the answer and worked solution →In which of the following regions of India are you most likely to come across the 'Great Indian Hornbill' in its natural habitat?Read the answer and worked solution →'Gadgil Committee Report' and 'Kasturirangan Committee Report', sometimes seen in the news, are related toRead the answer and worked solution →Recently, for the first time in our country, which of the following States has declared a particular butterfly as 'State Butterfly'?Read the answer and worked solution →

Worked practice questions

Consider the following: I. Cigarette butts II. Eyeglass lenses III. Car tyres How many of them contain plastic?

  1. Only one
  2. Only two
  3. All the three
  4. None
Show answer and solution

Correct answer: C. All the three

UPSC CSE Prelims 2025 (GS-I, Set A), Q.44. Official answer key: C.

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Artificial way of causing rainfall to reduce air pollution makes use of

  1. silver iodide and potassium iodide
  2. silver nitrate and potassium iodide
  3. silver iodide and potassium nitrate
  4. silver nitrate and potassium chloride
Show answer and solution

Correct answer: A. silver iodide and potassium iodide

UPSC CSE Prelims 2025 (GS-I, Set A), Q.85. Official answer key: A.

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Which one of the following shows a unique relationship with an insect that has coevolved with it and that is the only insect that can pollinate this tree?

  1. Fig
  2. Mahua
  3. Sandalwood
  4. Silk cotton
Show answer and solution

Correct answer: A. Fig

Answer: A. Fig has the unique coevolved relationship with a single insect pollinator. The fig (Ficus species) has one of the most famous mutualistic relationships in nature with the FIG WASP (family Agaonidae). Each fig species is typically pollinated by ONE specific wasp species. The wasp enters through the ostiole of the fig syconium, pollinates the female flowers and lays eggs inside. The fig fruit is biologically an inverted inflorescence and cannot be pollinated by any other insect. Distractors fail: Mahua is pollinated by bats and various insects (not species-specific). Sandalwood is pollinated by various bees, flies and beetles. Silk cotton (Bombax ceiba) is pollinated by birds (sunbirds, mynas) and bats. Source: syllabus Biology Ch 1 (Reproduction in Organisms) + standard ecology references on plant-pollinator coevolution.

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More Environment topics

ConservationEndangered SpeciesProtected AreasEnvironment BasicsNational ParksTransport & National Parks