Presenting the fully revised and updated edition of Arihant’s All-In-One for 2024-25. This comprehensive study guide provides all the necessary tools to understand the concepts, practice them and assess one’s progress. The present edition of Biology for class 12 is designed to enhance the learning experience for students. Tailored to align with the CBSE syllabus, this book offers a range of key features, including in this chapter, complete theory, comprehensive Mind Maps and Competency-Based Questions for effective practice. Besides this, the boxed matter adds informative content related to the given concept, while chapter summary helps to revise the chapter quickly at the time of examination. Our commitment to clarity is further emphasised through “Illustrative Figures”, incorporating diagrams that bring concepts to life. Also in each chapter, chapter summary, topical exercises, NCERT Questions, NCERT Exemplar problems, and Exam Pattern Exercise are given for practice. Aligned with the probable exam pattern, it also includes last 10 years Board Exams upto 2024, latest CBSE Sample Paper, CBSE Examination Paper 2024, 3 sample question papers and Diksha App Questions for thorough preparation. This book presents the entire NCERT Textbook in a logical and accessible manner, enabling students to immerse themselves fully in their studies.