📘 Q.2 IAS Prelims 2024 — Environment & Ecology (Insect Diversity)🧷 Authentic Classroom Explanation by IAS Monk


📌 The Question:
The organisms “Cicada, Froghopper and Pond skater” are:

(a) Birds
(b) Fish
(c) Insects
(d) Reptiles


Correct Answer: (c) Insects


🔍 Classroom Explanation:

  • Cicada 🦗
    Cicadas belong to the superfamily Cicadoidea under the order Hemiptera.
    They are well known for:
    • Long life cycles (some species: 13 or 17 years underground)
    • Loud mating calls
    • Clear membranous wings
  • Froghopper (Spittlebug)
    Froghoppers belong to the superfamily Cercopoidea (Hemiptera).
    Key traits:
    • Exceptional jumping ability
    • Nymphs produce frothy “spittle” for protection
    • Plant sap feeders
  • Pond skater (Water strider)
    Pond skaters are insects under family Gerridae (Hemiptera).
    They:
    • Walk on water using surface tension
    • Are predatory/scavenging insects
    • Are classic examples of biomechanical adaptation

👉 All three organisms are insects, specifically under the order Hemiptera (true bugs).


🧠 Curiosity Raiser:
How can pond skaters walk on water without sinking?
👉 Their legs are covered with water-repellent micro-hairs, maximizing surface tension.


📚 Enrich Notes (Prelims Edge):

  • Hemiptera = piercing–sucking mouthparts
  • Froghoppers hold the record for highest jump relative to body size
  • Cicadas are ecological indicators of soil and forest health

🕊️ IAS Monk Whisper:
“Evolution whispers its genius through insects — tiny bodies, mighty innovations.”

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