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Animal Husbandry & Veterinary Science 2021 Paper II 50 marks 150 words Compulsory Discuss

Paper II — Q5

Discuss the following in about 150 words each: (a) Development of bone, fat and muscle tissues in mammalian embryo (10…

Discuss the following in about 150 words each: (a) Development of bone, fat and muscle tissues in mammalian embryo (10 marks) (b) Vitamin B complex deficiency in poultry (10 marks) (c) Determination of time of death (TOD) in animals in veterolegal cases (10 marks) (d) Packaging of milk and milk products (10 marks) (e) Eating quality of meat (10 marks)

हिंदी में प्रश्न पढ़ें

निम्नलिखित में से प्रत्येक की लगभग 150 शब्दों में विवेचना कीजिए : (a) स्तनधारी भ्रूण में अस्थि, वसा एवं मांसपेशियों के उतकों का विकास (10 अंक) (b) कुक्कुट (पोल्ट्री) में विटामिन बी० कॉम्प्लेक्स की कमी (10 अंक) (c) पशुचिकित्सा-कानूनी मामलों में पशुओं की मृत्यु के समय (टी० ओ० डी०) का निर्धारण (10 अंक) (d) दुध और दुध उत्पादों की पैकेजिंग (10 अंक) (e) मांस की खाने योग्य गुणवत्ता (10 अंक)

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Directive word: Discuss

This question asks you to discuss. The directive word signals the depth of analysis expected, the structure of your answer, and the weight of evidence you must bring.

See our UPSC directive words guide for a full breakdown of how to respond to each command word.

How this answer will be evaluated

Approach

The directive 'discuss' requires balanced coverage of all five sub-parts with explanatory depth. Allocate approximately 30 words (20% time) per sub-part, ensuring each receives equal treatment since marks are evenly distributed. Structure as five distinct mini-answers without an overarching introduction or conclusion; begin each sub-part with its letter label for clarity.

Key points expected

  • (a) Embryonic tissue development: mesodermal origin of all three tissues; myogenesis (myotome→myoblasts→myofibers), adipogenesis (lipoblasts→adipocytes), osteogenesis (osteoblasts→osteocytes); critical windows (primary vs secondary fiber formation)
  • (b) B-complex deficiency: thiamine (polyneuritis, star-gazing), riboflavin (curled toe paralysis), pantothenic acid (dermatitis), biotin (foot pad lesions), B12 (anemia); interdependence and synthetic vitamin supplementation in commercial rations
  • (c) TOD determination: post-mortem changes (algor mortis, rigor mortis, livor mortis); entomological evidence (succession of Diptera species); gastric emptying; ocular changes (vitreous potassium); PMI estimation formulae
  • (d) Dairy packaging: aseptic UHT packaging (Tetra Pak), HDPE bottles, pouch milk; modified atmosphere packaging for cheese; cold chain maintenance; FSSAI labeling requirements; shelf-life extension mechanisms
  • (e) Meat eating quality: tenderness (collagen solubility, sarcomere length), juiciness (water-holding capacity, intramuscular fat), flavor (volatile compounds from Maillard reaction, lipid oxidation); objective measures (Warner-Bratzler shear force) vs sensory panels

Evaluation rubric

DimensionWeightMax marksExcellentAveragePoor
Demand-directive understanding20%10Demonstrates that 'discuss' requires explanatory coverage across all five distinct domains; for (a) traces developmental processes, for (b) links deficiency to clinical signs, for (c) integrates multiple TOD indicators, for (d) covers both materials and regulatory aspects, for (e) connects biochemical factors to sensory outcomesAttempts coverage of all parts but treats some superficially; may misinterpret one sub-part (e.g., describing rather than discussing embryonic development) or over-elaborate on one at expense of othersMisses 1-2 sub-parts entirely or fundamentally misunderstands directive (e.g., merely listing without explanation); disproportionate allocation (e.g., 80 words on one part, 10 on another)
Content depth & accuracy20%10Precise embryological terminology (somites, myogenic regulatory factors); accurate vitamin-specific lesions; correct forensic timeframes (rigor mortis 1-6 hours); specific packaging materials and their properties; scientifically valid meat quality parameters with mechanismsGenerally correct but with minor errors (e.g., confusing primary and secondary muscle fiber formation, or generalizing B-complex symptoms); vague on forensic precision; omits specific packaging standards or meat quality measurement methodsSignificant factual errors (e.g., wrong germ layer origin, confusing vitamin deficiencies, incorrect PMI estimation, describing non-food grade packaging, conflating meat safety with eating quality); outdated or disproven concepts
Structure & flow20%10Clear five-part segmentation with visible (a)-(e) labels; each sub-part internally structured with logical progression (e.g., cause→mechanism→manifestation→consequence); maintains approximately 30 words per section; seamless transitions between technical domainsAll five parts present but organization inconsistent; some sections lack internal logic (e.g., random listing of symptoms without grouping by vitamin); word count imbalances visible; occasional mixing of content between sub-partsPoor or missing segmentation; rambling narrative without clear part identification; severe word misallocation; confusing cross-references that blur distinct domains; illegible handwriting or formatting further compounds structural weakness
Examples / case-law / data20%10Cites specific Indian contexts: NDDB packaging standards for (d); FSSAI Regulations 2011; mentions specific poultry breeds for B-complex studies; references Indian forensic veterinary cases (e.g., cattle poisoning TOD determination); cites WBSF values for meat tenderness; notes Tetra Pak's Indian operationsGeneric examples without Indian specificity; mentions packaging types or forensic methods without regulatory context; cites meat quality parameters without standard values; no reference to Indian veterinary jurisprudence or dairy industry standardsNo examples whatsoever; or irrelevant examples (human forensic medicine without adaptation to animals; human nutrition references for poultry); fabricated case references; examples that contradict established science
Conclusion & analytical edge20%10Each sub-part concludes with a forward-looking or integrative insight: for (a) implications for fetal programming; for (b) economic impact on layer industry; for (c) limitations of TOD methods in tropical climates; for (d) sustainability of packaging innovations; for (e) consumer preference trends in Indian marketSome sub-parts end abruptly or with mere summary; limited analytical extension; no cross-connection between domains (e.g., how embryonic development affects ultimate meat quality); conclusions restate facts without synthesisNo concluding element in any sub-part; purely descriptive throughout; or attempts grand conclusion that forces artificial unity on disparate topics; analytical claims that reveal fundamental misunderstanding of subject matter

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