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TSPSC Telangana Environment — practice by topic

Browse 72 questions across 7 Environment topics. Choose what you want to revise, then open a question to check its answer and worked solution.

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Environment topics

Environment & Ecology (68)Conservation (50)Endangered Species (50)Protected Areas (50)Environment Basics (49)National Parks (49)Transport & National Parks (49)

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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 →

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
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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
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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
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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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