UKSSSC Livestock Extension Officer 2026 – Biology (Botany & Zoology) Overnight Revision Guide

With the UKSSSC Livestock Extension Officer (LEO / पशुधन प्रसार अधिकारी) Exam scheduled for 18th October, here is your quick, high-yield revision PDF for Biology (Botany & Zoology). This guide is designed for fast recall of critical facts, scientific names, physiological mechanisms, and genetic concepts right before entering the examination hall.

Download the free revision PDF below and use it alongside our online mock tests to evaluate your preparation.

What is Covered in This Revision Guide:

• Unit 1 (Evolution & Adaptations): Hardy-Weinberg equilibrium, Lamarckism, Weismann germplasm theory, genetic drift, adaptive radiation, hominid fossil Lucy, and xerophytic plant adaptations.
• Unit 2 (Cytology, Genetics & Tissues): Polytene chromosomes, Balbiani rings, nucleosome core structure (146 bp), Turner (45,XO) and Klinefelter (47,XXY) syndromes, X-linked inheritance, enzyme kinetics (Km/Vmax), and meristem theories.
• Unit 3 (Cryptogams, Fungi & Diversity): Puccinia rust spore stages, Chara sex organs (Globule & Nucule), Anthoceros columella, Selaginella heterospory, Cycas motile gametes, and Gnetum advanced traits.
• Unit 4 (Angiosperm Taxonomy & Plant Physiology): Bentham & Hooker classification, floral formulas (Lamiaceae, Brassicaceae, Fabaceae), Z-scheme (P680), C2 photorespiration organelles, CAM pathways, and vernalization.
• Unit 5 (Invertebrate Zoology): Plasmodium sporozoites, sponge choanocytes, Obelia metagenesis, Wuchereria bancrofti, Nereis trochophore larva, Limulus living fossil, Pila torsion, and starfish water vascular system.
• Unit 6 (Vertebrate Zoology): Balanoglossus anatomy, Herdmania retrogressive metamorphosis, lungfishes (Dipnoi), Sphenodon parietal eye, avian flight adaptations, and egg-laying monotremes.
• Unit 7 (Animal Physiology & Systems): Sliding filament theory & ATP, ECG wave intervals (P, QRS, T), nephron counter-current system, RAAS blood pressure control, calcitonin vs PTH, saltatory nerve conduction, and LH surge.
• Unit 8 (Embryology & Ethology): Spemann-Mangold primary organizer, amnion protective fluid, Lorenz filial imprinting, honeybee waggle dance, and composite fish polyculture.
• Unit 9 (Ecology & Biodiversity): Inverted pyramids, logistic growth curve, Corbett National Park, Asan Wetland, Musk Deer Schedule I protection, and IUCN categories.
• Unit 10 (Biotechnology & Biostatistics): EcoRI restriction enzyme, PCR thermal cycles, cellular totipotency, and standard deviation calculations.
• Reference Tables: Angiosperm floral formulas, human evolution stages, and cranial capacity comparisons.

Written & Verified by Prakash Joshi

Expert Faculty

Prakash Joshi is a pharmacy professional and Zoology graduate with an interest in life sciences, biology, and competitive exam preparation. Combining his pharmacy background with his academic knowledge of Zoology, he contributes to the development of educational content, practice questions, and exam-oriented study materials at SoloTutes. His work focuses on simplifying complex concepts, providing accurate and useful learning resources, and helping students prepare effectively for competitive examinations. Through SoloTutes, he aims to make quality educational content accessible to aspirants across India.

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