Written by experienced IB professionals and developed in cooperation with the IB, this 2023 edition of the Biology course book for the Diploma Programme offers: Features - Covers the content of the new 2023 Biology syllabus with complete accuracy and is structured around the curriculum. - Adopts a concept-based approach through four integrating themes: unity and diversity, form and function, interaction and interdependence, and continuity and change. - Facilitates teaching by integrating subject knowledge, the Nature of Science, and Theory of Knowledge. - Contributes to the development of the inquiry process, allows for conceptual understanding, and includes guiding questions in each chapter. - Focuses on both knowledge acquisition and mastery of skills. Written by experienced IB authors and teachers.