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GS Paper IUPSC Prelims 2024
Biodiversity & Conservation
Question No. 195Interactive Test Mode
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+2-0.66

Q195. Consider the following: 1. Butterflies 2. Fish 3. Frogs How many of the above have poisonous species among them?

Consider the following:

  1. Butterflies
  2. Fish
  3. Frogs

How many of the above have poisonous species among them?

Select the correct option below (or cross out options to eliminate)
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Official Answer Key & Detailed Solution

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Official UPSC Answer KeyUPSC Prelims 2024 • Environment and Ecology

Correct Answer: Option (C) — All three

Concept & Option Breakdown

Standard Reference Verified
  • Butterflies: Many butterflies (such as Monarch butterflies and Heliconius species) synthesize or sequester toxic chemicals (like cyanogenic glucosides and cardiac glycosides) from host plants, making them poisonous to predators.
  • Fish: Several fish species are poisonous when ingested (e.g., Pufferfish containing tetrodotoxin).
  • Frogs: Poison dart frogs (Dendrobatidae) and certain toads secrete potent toxins from their skin glands, making them lethal when touched or eaten.

Thus, poisonous species are found in all three groups.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2024 (Q195)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicEnvironment and Ecology → Biodiversity & Conservation
Official Answer KeyOption (C) — All three

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Frequently Asked Questions — UPSC Prelims 2024 Q195

What is the official answer for UPSC Prelims 2024 GS Paper I Question 195 (Environment and Ecology)?

The official UPSC answer key for this 2024 Environment and Ecology (Biodiversity & Conservation) question is Option (C): "All three". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2024 question belong to?

This question belongs to GS Paper I under the subject "Environment and Ecology" and micro-topic "Biodiversity & Conservation". You can explore all repeated questions from Biodiversity & Conservation in Acme AI's 3D Prelims PYQ Realm or practice 50 full-length and sectional tests in the APT Prelims Test Series.

How can I solve this Biodiversity & Conservation UPSC Prelims question using option elimination?

To solve Biodiversity & Conservation questions in UPSC Prelims, identify extreme modifiers, verify core NCERT conceptual definitions, and eliminate mutually contradictory statement pairs before locking your final option.

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Previous QuestionWhich 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?
Next QuestionConsider the following pairs: | | Country | Animal Found in its Natural Habitat | | :--- | :--- | :--- | | 1. | Brazil | Indri | | 2. | Indonesia | Elk | | 3. | Madagascar | Bonobo | How many of the pairs given above are correctly matched?