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Biology

NCERT Class 11 Biology textbook

19 chaptersClass 11 CBSE hubBiology subject hub

About this book

Explore the fascinating world of Biology in Class 11 with this comprehensive book, designed to cover essential topics that enhance understanding for students and parents alike.

Move chapter by chapter through the book from one canonical hub.

What students usually cover in Biology

  • Explore the fascinating world of Biology in Class 11 with this comprehensive book, designed to cover essential topics that enhance understanding for students and parents alike.
  • This Class 11 Biology book delves into the vast diversity of life, covering essential topics such as taxonomic categories, cell structure, photosynthesis, and human anatomy.
  • Featuring in-depth discussions on plants, animals, and their physiological processes, it offers students a solid foundation in biological sciences.
  • Students will learn about the classification of organisms, plant and animal cell functions, respiration, growth, and development, alongside practical investigations and experiments to deepen knowledge.

Syllabus breakdown

This Class 11 Biology book delves into the vast diversity of life, covering essential topics such as taxonomic categories, cell structure, photosynthesis, and human anatomy. Featuring in-depth discussions on plants, animals, and their physiological processes, it offers students a solid foundation in biological sciences. Students will learn about the classification of organisms, plant and animal cell functions, respiration, growth, and development, alongside practical investigations and experiments to deepen knowledge. Ideal for both students and parents, this book serves as a valuable resource for exam preparation and scientific exploration.

Chapters in Biology

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The Living World

Explore the diverse living organisms on Earth in this chapter, which focuses on the classification and taxonomy of life forms. Understand how species are categorized and named.

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Biological Classification

This chapter covers Biological Classification, exploring the systems established since ancient times to classify living organisms. Key topics include the Five Kingdom Classification, encompassing Monera, Protista, Fungi, Plantae, and Animalia, each defined by unique characteristics.

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Plant Kingdom

The Plant Kingdom chapter provides a detailed examination of major plant groups including Algae, Bryophytes, Pteridophytes, Gymnosperms, and Angiosperms, exploring their classification, characteristics, and ecological significance.

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Animal Kingdom

Chapter 4 of Biology focuses on the Animal Kingdom, covering its vast diversity and classification. It discusses the fundamental features that distinguish various animal phyla, highlighting their structural and functional characteristics.

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Morphology of Flowering Plants

This chapter on the morphology of flowering plants details the structure and classification of roots, stems, leaves, flowers, fruits, and seeds, emphasizing their adaptations and functions in the plant kingdom.

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Anatomy of Flowering Plants

This chapter explores the internal structure and functional organization of flowering plants. It covers various tissue systems and their roles, highlighting differences between dicotyledonous and monocotyledonous plants.

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Structural Organisation in Animals

This chapter explores the structural organization in animals, focusing on tissues, organs, and organ systems, with particular emphasis on frogs as examples of multicellular organisms.

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Cell : The Unit of Life

This chapter, 'Cell: The Unit of Life', introduces students to the fundamental unit of life, covering various aspects of cell structure, functions, and types. It is essential for understanding biological processes at a cellular level.

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Biomolecules

This chapter, 'Biomolecules,' introduces the components and structures that define life, exploring various organic compounds found in living organisms, including proteins, carbohydrates, nucleic acids, and lipids, along with the chemical analysis techniques used to study them.

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Cell Cycle and Cell Division

This chapter covers the cell cycle and cell division, essential processes for growth and reproduction in all living organisms. Topics include the phases of the cell cycle, the significance of mitosis and meiosis, as well as the mechanisms underlying these processes.

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Photosynthesis in Higher Plants

This chapter explores 'Photosynthesis in Higher Plants', focusing on the mechanism through which green plants convert light energy into chemical energy. It discusses the significance of photosynthesis, the factors affecting it, and the processes involved.

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Respiration in Plants

This chapter explores respiration in plants, focusing on the essential processes that provide energy for life through cellular respiration, photosynthesis, and glycolysis.

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Plant Growth and Development

Chapter 13 of Biology discusses Plant Growth and Development, covering essential topics such as growth, differentiation, development, and plant growth regulators. This chapter explores the processes involved in plant development from germination to mature stages.

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Breathing and Exchange of Gases

This chapter delves into the essential processes of breathing and gas exchange in organisms, focusing on the mechanisms that facilitate the transport of oxygen and carbon dioxide in humans, alongside the regulation and associated disorders of the respiratory system.

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Body Fluids and Circulation

This chapter focuses on the crucial role of body fluids, particularly blood and lymph, in circulation. It explains their composition, functions, and the mechanisms underlying blood circulation, including the cardiac cycle and regulation of heart activity.

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Excretory Products and their Elimination

This chapter discusses the human excretory system and the elimination of nitrogenous wastes like ammonia, urea, and uric acid. It covers urine formation, kidney function regulation, and disorders of the excretory system.

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Locomotion and Movement

The chapter 'Locomotion and Movement' from the Biology textbook for Class 11 explores the mechanisms and types of movements in living organisms, including human muscles, skeleton, joints, and related disorders.

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Neural Control and Coordination

Chapter 18, 'Neural Control and Coordination,' explores the intricate functioning of the human neural system, focusing on the role of neurons in signal transmission. It details the central and peripheral nervous systems, mechanisms of neural coordination, and the types of neurons involved.

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Chemical Coordination and Integration

This chapter explores the intricate systems of chemical coordination in the human body, emphasizing the roles of various endocrine glands and hormones in regulating physiological functions and maintaining homeostasis.

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Biology FAQs

Explore essential topics in Class 11 Biology including plant and animal life, cell biology, and human anatomy. Prepare for exams with clear explanations and practical insights.

The Class 11 Biology textbook covers a wide range of topics including diversity in living organisms, taxonomic categories, cell structure, respiration, growth and development, photosynthesis, and human anatomy. This thorough coverage helps in building a strong foundation in biological sciences for students.
Yes, the Class 11 Biology book is suitable for beginners. It presents complex topics in an understandable manner and provides clear explanations, making it accessible to students who are new to biological concepts.
This book helps in exam preparation by providing clear explanations, engaging illustrations, and practice questions related to each topic. It helps students reinforce their understanding and prepares them effectively for their exams.
Yes, the Class 11 Biology textbook includes practical experiments and investigations related to various biological processes. These experiments provide hands-on experience and help students better understand theoretical concepts.
The target audience for this Biology book includes Class 11 students and their parents. The content is designed to facilitate learning and support both students in their studies and parents in guiding their children.
Studying plant and animal biology is significant as it helps students understand the interactions within ecosystems, the physiology of living organisms, and the importance of biodiversity. This knowledge is crucial for environmental conservation and biological research.
Yes, the Class 11 Biology textbook includes various illustrations and diagrams to aid understanding of complex biological concepts. These visual aids enhance the learning experience for students.
Plant growth regulators are chemicals that influence plant growth and development. They help regulate processes such as cell division, elongation, and differentiation, making them crucial for studies in plant biology and agriculture.
Yes, the Class 11 Biology book covers various aspects of human anatomy, including the structure and function of major organ systems such as the circulatory, respiratory, and nervous systems, providing a comprehensive understanding of human biology.
Complex biological concepts are explained using clear language, real-life examples, and visual aids such as diagrams and charts, making the material more relatable and easier to understand for students.
Yes, the Class 11 Biology book can be beneficial for competitive exam preparations as it covers fundamental concepts and provides practice questions that align with exam patterns, helping students bolster their knowledge and skills.
The textbook covers various aspects of plant life including classifications such as algae, bryophytes, pteridophytes, gymnosperms, and angiosperms, along with their structures, functions, and processes essential for their growth and development.
The book addresses human health and diseases by discussing the structure and functioning of the excretory and circulatory systems, along with common disorders associated with these systems, thereby providing insights into human health.
The book discusses various cell processes including cell division (mitosis and meiosis), cell metabolism, and cell communication. These processes are fundamental to understanding how living organisms function and interact.
Yes, the Class 11 Biology book includes sections on environmental biology, focusing on the importance of biodiversity, ecosystems, and conservation efforts, helping students understand the impact of human activity on the environment.
The textbook explores the structure of proteins, discussing primary, secondary, tertiary, and quaternary structures, along with the relationship between protein structure and its function in biological systems.
The Class 11 Biology book includes discussions on biochemistry, such as the metabolism of carbohydrates and lipids, and the roles of enzymes, providing insights into biochemical processes that sustain life.
The book explains photosynthesis by detailing the light and dark reactions, the role of chlorophyll, and the process of conversion of solar energy into chemical energy, along with factors affecting photosynthesis efficiency.
Key concepts in animal biology covered in the book include classification of animals, organ systems, and anatomy of major animals, focusing on their structure, function, and adaptations in various environments.
Studying genetics is important as it helps understand heredity, variation, and the principles that govern inheritance in living organisms. This foundational knowledge is essential for exploring fields such as biotechnology and medicine.
The textbook adopts a student-friendly approach with structured content, engaging visuals, practical examples, and review questions at the end of each chapter to facilitate understanding and retention of biological concepts.
Disorders in biological systems are explained through descriptions of their causes, effects, and relevance to human health, helping students understand the interconnectedness of biology and medicine.

Academic Reviewers for Biology

Meet the reviewers who help validate the academic quality of this book's chapter sequence, explanations, and practice support.

Dr. Kavita Menon

Dr. Kavita Menon

CBSE Biology & Life Sciences Reviewer

Ph.D. Life Sciences, M.Sc. Zoology, B.Ed.

10+ years of CBSE-aligned biology teaching and content review experience

BiologyBiotechnology
Coverage•Class 11, Class 12

Biology and life sciences educator with 11+ years of experience in CBSE curriculum design, NCERT content review, and biotechnology education.

57chapters reviewed5,606questions reviewed