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12th Loyola EC Uyiriyal & Thavaraviyal (Biology Tamil Medium) Guide is a complete study material designed for HSC students based on the latest 2026–2027 Tamil Nadu State Board syllabus.

This guide covers both Botany (Thavaraviyal) and Zoology (Uyiriyal) with clear explanations, diagrams, and easy-to-understand concepts in Tamil.

It includes book back answers, key points, additional questions, PTA & Government exam questions with answers, helping students prepare effectively for public exams.

Special focus is given to diagrams, definitions, and important questions, making it ideal for scoring high marks in Biology.