Classical Biology is the first volume of the twin set, draws on over a decade of author's teaching and research experience to highlight the foundational pillars of life sciences. Covering essential subjects like Origin and Evolution of Life, Genetics, Taxonomy, Plant and Animal Physiology, Reproduction and Embryology, Ecology, Animal Behaviour, and Economic Botany and Zoology, this book is designed in line with the New Education Policy that emphasises holistic and interdisciplinary learning. Each chapter offers clear explanations with helpful illustrations, making complex concepts accessible and engaging. From tracing life's beginnings and heredity to exploring ecology and biodiversity's practical importance, the book blends conceptual clarity with relevance. Serving as a comprehensive yet concise resource, it is ideal for BSc and MSc students as well as aspirants of competitive exams. With its lucid style and systematic approach, Classical Biology stands as an indispensable guide for academic success and lifelong learning in biology