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CAPF AC Environment & Ecology — practice questions

Explore 25 free Environment & Ecology questions in CAPF AC 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 1–25 of 25.

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 →Abiotic or biotic?Read the answer and worked solution →Complete the definition of an ecosystemRead the answer and worked solution →Tap every one of the four functional componentsRead the answer and worked solution →True or false: structure and functionRead the answer and worked solution →Complete the definition of primary productivityRead the answer and worked solution →Which role does this organism play?Read the answer and worked solution →True or false: productivityRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Complete the definition of biodiversityRead the answer and worked solution →The numbers the chapter givesRead the answer and worked solution →Tap every level conservation targetsRead the answer and worked solution →True or false: biodiversityRead the answer and worked solution →Which level of diversity?Read the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Flip and pair: figure with what it countsRead the answer and worked solution →Spot the one that does not belongRead 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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