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Prelims 2023 paper

UPSC CSE Prelims 2023 · Question 15 · Biodiversity, plants & animals

Which of the following organisms perform waggle dance for others of their kin to indicate the…

Prelims 2023 · Q15

Biodiversity, plants & animals Easy

Which of the following organisms perform waggle dance for others of their kin to indicate the direction and the distance to a source of their food?

Answer & explanation

Answer: (c) Honeybees

The waggle dance is the honeybee's way of telling hive-mates where food lies. Karl von Frisch decoded it and shared the 1973 Nobel Prize in Physiology or Medicine for this work.

  • ✓ (c) A forager returning from a source more than about 50 m away runs a straight line on the vertical comb while wagging her abdomen; the angle of that run shows the direction relative to the sun, and the vigour of wagging signals distance.
  • ✗ (d) Wasps are social insects too, but they do not use a symbolic dance to point nestmates to food.
  • ✗ (a) Butterflies are solitary foragers and have no dance language for sharing the location of nectar.

Remember · Honeybees: round dance for food close to the hive, waggle dance for food farther away (direction relative to the sun plus distance). Decoded by Karl von Frisch (Nobel 1973).

Sources

Question and answer: UPSC's official GS Paper I (2023, Series A) — paper ↗ · answer key ↗. Explanation: Minimalist IAS, checked 30 Sept 2026 (how we verify). ·

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