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  • PYQs (GS & Optional)
  • (h) Arthropoda: Larval forms and parasitism in Crustacea; vision and respiration in arthropods (Prawn, cockroach and scorpion); modification of mouth parts in insects (cockroach, mosquito, housefly, honey bee and butterfly); metamorphosis in insect and its hormonal regulation, social behaviour of Apis and termites

    • Describe the salient features of phylum Arthropoda. Classify the phylum up to classes giving their characteristics and suitable examples.
    • Larval Forms and Parasitism in Crustacea
      • Describe the different larval forms of Crustaceans with suitable diagrams.
      • Describe the larval forms of Crustacea with suitable diagrams.
      • Give an account of larval forms in Crustacea with examples and diagrams. Also write a note on the significance of larvae.
      • Parasitism in Crustacea.
      • Give a detailed account of various larval forms of crustaceans and discuss their significance.
      • Give an account of the larval forms of Crustaceans. Add a note on their taxonomic significance.
    • Sub-Topic: Copepoda
      • Discuss parasitism in Copepoda. Comment on structural peculiarities of parasitic copepods.
      • Discuss parasitism in Copepoda. Comment on structural peculiarities of parasitic copepods.
      • Describe the great departures shown by parasitic forms from the diagnostic features of free-living forms among Copepoda.
    • Vision and Respiration in Arthropods (Prawn, Cockroach, and Scorpion)
      • Describe the structure and role of book-lungs in scorpions.
      • Vision in arthropods.
      • Describe the respiratory organs and mechanism of respiration in cockroach.
      • Structure of visual organs of cockroach.
      • Explain the structure of respiratory organs and write the mechanism of terrestrial and aquatic respiration in arthropods.
      • Vision and respiration in prawn.
      • Vision and respiration in cockroach.
      • Vision and respiration in scorpion.
    • Modification of Mouthparts in Insects (Cockroach, Mosquito, Housefly, Honey Bee, and Butterfly)
      • Write an account on modification of mouthparts in Insecta. Give suitable examples and diagrams.
      • With the help of labelled diagrams, describe the mouth parts of housefly, butterfly, and honeybee.
      • Give an illustrated account of different types of mouth parts in insects and write a note on their functional significance.
      • Describe the biting and chewing, siphoning, and piercing and sucking mouth parts in insects with suitable examples.
      • Differentiate the structural variation of mouthparts in Insecta diagrammatically and label them.
      • Differentiate the structural variation of mouthparts in Insecta diagrammatically and label them.
      • Draw a labelled diagram of the alimentary canal and salivary apparatus in Periplaneta americana.
      • Give the salient features of Apterygota and Pterygota.
      • Write a detailed account of modification of mouthparts in insects and support your answer with well-labelled diagrams.
      • Blood feeding and phytophagous insects. (200 Words)
    • Metamorphosis in Insects and its Hormonal Regulation
      • Metamorphosis in Insects.
      • Define metamorphosis. Explain the hormonal control of metamorphosis in insects.
      • Describe the hormonal regulation of metamorphosis in amphibians.
      • What is metamorphosis? Describe the hormonal regulation of metamorphosis in insects.
      • Give a brief account of hormonal regulation of metamorphosis in insects.
      • "Glycolysis is considered as metabolic hub." Justify. What is metamorphosis? Explain the role of thyroxine in the regulation of amphibian metamorphosis.
      • Explain the neuro-endocrine regulation of insect metamorphosis with suitable illustrations. Comment on the role of JH (Juvenile Hormone) in insect metamorphosis.
      • Explain the types of metamorphosis in insects and their hormonal regulation.
      • What is metamorphosis? Differentiate between retrogressive and progressive metamorphosis, with figures and examples. How are they regulated?
      • Suitable illustrations delineate the role of triiodothyronine and tetraiodothyronine in amphibian metamorphosis.
      • Discuss the interactive role of thyroxine and prolactin during various phases of growth and differentiation in amphibian metamorphosis. (Repeated in both entriesmerged here.)
      • Give an illustrated account of interaction of neuroendocrine secretions in promoting metamorphosis in an orthopteran and a lepidopteran insect. Mention the type of metamorphosis that these insects undergo.
      • Explain the metamorphosis in insects and its hormonal regulation.
      • Metamorphosis in insects.
      • Hormonal regulation of metamorphosis in insects. (200 words)
      • Causes of metamorphosis in insects.
      • Retrogressive metamorphosis.
    • Social Behaviour of Apis (Honey Bee) and Termites
      • Social behaviour in honeybees
      • Write an account on the Social Behavior in Apis and Termites.
      • Give an account of Social behavior in Termites.
      • Give an account of Social behavior in Termites.
      • Apis is known for social behaviour. Discuss.
      • Apis is known for social behaviour. Discuss.
      • Compare the social organization of termites and honeybees.
      • Give a brief account of social organisations and determination of 'castes' in termites.
      • Social behaviour of Apis 200 Words
      • Discuss the social life of honeybees and termites.
  1. PYQs and Practice Questions
  2. UPSC Optionals
  3. Zoology Optional
  4. Non-chordata and Chordata
  5. (h) Arthropoda: Larval forms and parasitism in Crustacea; vision and respiration in arthropods (Prawn, cockroach and scorpion); modification of mouth parts in insects (cockroach, mosquito, housefly, honey bee and butterfly); metamorphosis in insect and its hormonal regulation, social behaviour of Apis and termites
  6. Metamorphosis in Insects and its Hormonal Regulation

Explain the neuro-endocrine regulation of insect metamorphosis with suitable illustrations. Comment on the role of JH (Juvenile Hormone) in insect metamorphosis. (UPSC 2018, 15 Marks, )

  1. Posted by: Synopsis IAS
  2. Posted on:31 July 2025
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कीट रूपांतरण के न्यूरो-एंडोक्राइन विनियमन को उपयुक्त चित्रों के साथ समझाएं। कीट रूपांतरण में जेएच (जुवेनाइल हार्मोन) की भूमिका पर टिप्पणी करें। (Explain the neuro-endocrine regulation of insect metamorphosis with suitable illustrations. Comment on the role of JH (Juvenile Hormone) in insect metamorphosis.)
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