Class 11-12 Biology

The Class 11-12 Biology textbook is published by the National Curriculum and Textbook Board (NCTB) of Bangladesh and is the standard biology text for Higher Secondary students preparing for HSC examinations. Biology at this level prepares students for medical, agricultural, environmental, and life-science studies at university, and the book is structured accordingly.

The two-year curriculum covers cellular biology, genetics, evolution, anatomy and physiology of plants and animals, microbiology, ecology, and biotechnology. Throughout, the textbook combines theoretical explanation with diagrams, experimental procedures, and questions designed for both classroom learning and independent study.

This PDF is provided to support Bangladeshi HSC students and to anyone wanting a thorough introduction to biology in the Bengali language.