NCERT Class 11 Biology Notes - Download Chapter Wise PDF Notes

Class 11 Biology Notes are the revision notes that discuss all the chapters covered in the Class 11th NCERT Biology. The chapter-wise Biology Class 11 notes help to learn the syllabus in detail. Included units in biology notes for Class 11 are: diversity in the living world, structural organisation in plants and animals, cell structure and function, plant physiology, and human physiology. NCERT Class 11 Biology Book chapter-wise notes include a total of 22 chapters. Our meticulously curated CBSE Class 11 Biology Notes serve as your best guide to success. In this article, we delve into the intricacies of Biology notes for Class 11, ensuring you are well-prepared for the CBSE 11th Class Biology examinations. The NCERT Class 11 biology notes are revision notes on Class 11 NCERT biology chapters. The Class 11 biology revision notes can be downloaded, and the CBSE Class 11 biology notes PDF can be used offline.

Also read:

• NCERT Notes: Class 9 to 12
• NCERT Exemplar: Class 9 to 12

Chapter wise Biology Notes For Class 11

NCERT Class 11 Biology notes include 22 chapters, of which 3 have been removed by NCERT from CBSE Syllabus. CBSE Class 11th is the base for advanced topics in the related subjects that will appear in Class 12. Thus, it becomes mandatory for Class 11 students to read and understand each of the topics in the easiest and most effective way for the NCERT Notes for Class 12. The NCERT Biology Class 11 Notes provide important notes on all the chapters. To optimise the study methodology, having revision notes and NCERT Solutions handy saves you time during revision.

CBSE Class 11 Biology Notes explain all the important concepts, diagrams, and frequently asked questions. Students can easily download all the NCERT Notes for Class 11 Biology PDF for free and score good marks in their board examination.

Following are the links to the class 11 Biology notes PDF download for all chapters:

Unit 1 – Diversity of Living Organism

• Chapter 1: The Living World
• Chapter 2: Biological Classification
• Chapter 3: Plant Kingdom
• Chapter 4: Animal Kingdom

Unit 2 – Structural Organisation in Plants and Animals

• Chapter 5: Morphology of Flowering Plants
• Chapter 6: Anatomy of Flowering Plants
• Chapter 7: Structural Organisation in Animals

Unit 3 – Cell Structure and Function

• Chapter 8: Cell The Unit of Life
• Chapter 9: Biomolecules
• Chapter 10: Cell Cycle and Cell Division

Unit 4 – Plant Physiology

• Chapter 11: Photosynthesis in Higher Plants
• Chapter 12: Respiration in Plants
• Chapter 13: Plant Growth and Development

Unit 5 – Human Physiology

• Chapter 14: Breathing and Exchange of Gases
• Chapter 15: Body Fluids and Circulation
• Chapter 16: Excretory Products and their Elimination
• Chapter 17: Locomotion and Movement
• Chapter 18: Neural Control and Coordination
• Chapter 19: Chemical Coordination and Integration

Deleted/Removed Chapter From Class 11 Biology

Three chapters have been deleted or removed from the latest syllabus of the NCERT Class 11 Bioogy Textbook 2023–24. The removed chapters are listed below:

• Transport in Plants
• Mineral Nutrition
• Digestion and Absorption

Also, students can refer,

• NCERT Solutions for Class 11 Biology Chapters
• NCERT Exemplar Solutions for Class 11 Biology Chapters

Significance of Biology Notes for Class 11

NCERT biology Class 11 notes will be helpful to revise the chapter and get an idea about the main topics covered in the chapter. Also, this NCERT Class 11 Biology notes PDF are useful to cover the main topics of the Class 12 CBSE Biology Syllabus and also for competitive exams like NEET. Other study materials (Notes, solutions, exemplars, books, etc.) for Class 11 are given below.

Other CBSE NCERT Study Resources

Class 11 students can access the notes, solutions, and exemplars for all subjects.

Subject-Wise NCERT Notes

Subject Wise NCERT Exemplar Solutions

• NCERT Exemplar Class 11 Solutions
• NCERT Exemplar Class 11 Chemistry
• NCERT Exemplar Class 11 Maths
• NCERT Exemplar Class 11 Physics

Chapter-wise Breakdown of CBSE Class 11 Biology Notes

Chapter 1, The Living World

The NCERT Class 11 chapter 1 notes are a part of biology notes for Class 11 unit 1 Diversity in living world. NCERT Class 11 Biology chapter 1 notes PDF free download deal with the basic understanding of living things and need for their classification. The living world Class 11 notes cover a brief outline of topics such as what is living, diversity in living world, taxonomic categories, taxonomical aids. Some of the topics covered in the living world Class 11 notes are characteristic features of living organisms, need for classification system, major taxonomic categories, and taxonomical aids.

Chapter 2, Biological Classification

The NCERT Class 11 chapter 2 notes are a part of biology notes for Class 11. NCERT Class 11 Biology chapter 2 notes deal with the systems of classification and various taxonomic categories. Biological classification Class 11 notes cover a brief outline of kingdoms monera, protista, fungi, plantae, animalia. Some of the topics covered in biological classification Class 11 notes are five kingdom classification system, archaebacteria, eubacteria, chrysophytes, dinoflagellates, euglenoids, slime oulds, protozoans, phycomycetes, ascomoycetes, basidiomycetes, deuteromycetes, virueses, viroids, prions, and lichens.

Chapter 3, Plant Kingdom

The NCERT Class 11 chapter 3 notes are a part of NCERT Class 11 unit 1 Diversity in living world. NCERT Class 11 Biology chapter 3 notes deal with classification of plants. Plant kingdom Class 11 notes cover a brief outline of algae, bryophytes, pteridophytes, gymnosperms, angiosperms. Some of the topics covered in Plant kingdom Class 11 notes are systems of classification, Chlorophyceae, phaeophyceae, Rhodophyceae, liverworts, mosses, pteridophytes, gymnosperms, life cycle of angiosperms, plant life cycle and alteration of generation.

Chapter 4, Animal Kingdom

The NCERT Class 11 chapter 4 notes are a part of NCERT Class 11 unit 1 Diversity in living world. NCERT Class 11 Biology chapter 4 notes deals with classification of animals. Animal kingdom Class 11 notes cover a brief outline of topics such as basis of classification and basis of classification of animals. Some of the topics covered in Animal kingdom Class 11 notes are levels of organisation, symmetry, diploblastic and triploblastic organisation, coelom, segmentation and notochord. biology chapter 4 notes includes phylum porifera, coelenterata, ctenophora, platyhelminthes, aschelminths, annelida, arthropoda, mollusca, echinodermata, hemicordata and chordata. animal kingdom notes also gives a brief overview of classes cyclostomes, chondrichthyes, osteichthyes, amphibia, reptilia, aves and mammalia.

Chapter 5, Morphology of Flowering Plants

The NCERT Class 11 chapter 5 notes are a part of NCERT Class 11 unit 2 Structural organisation in plants and animals. NCERT Class 11 Biology chapter 5 notes deal with the morphology of angiosperms. Morphology of flowering plants Class 11 notes cover a brief outline of important plant parts like roots, stem, leaf, inflorescence, flower, fruit, and seed. Some of the topics covered in Morphology of flowering plants Class 11 notes are regions of the root, modifications of the root, modification of the stem, leaf venation, types of leaves, phyllotaxy, modification of leaves, parts of a flower, androecium, gynoecium, parts of a fruit, structure of monocot and dicot seed, semi-technical description of a typical flowering plant and description of some important families.

Chapter 6, Anatomy of Flowering Plants

The NCERT Class 11 chapter 6 notes are part of NCERT Class 11 unit 2 structural organisation in plants and animals. NCERT Class 11 Biology chapter 6 notes deal with the internal structure of angiosperms. Anatomy of flowering plants class 11 notes cover a brief outline of topics such as the tissues, the tissue system, anatomy of dicotyledonous and monocotyledonous plants, and secondary growth in plants. Some of the topics covered in Anatomy of flowering plants Class 11 notes are meristematic tissue, permanent tissue, epidermal tissue system, ground tissue system, vascular tissue system, anatomy of dicot and monocot root, stem and leaf; and secondary growth.

Chapter 7, Structural Organisation in Animals

The NCERT Class 11 chapter 7 notes are part of NCERT Class 11 unit 2 structural organisation in plants and animals. NCERT Class 11 Biology chapter 1 notes deal with the internal structure of animals. Structural organisation in animals Class 11 notes cover a brief outline of topics such as animal tissues, organs, and organ systems, earthworms, cockroaches, and frogs. Some of the topics covered in Structural Organisation in animals Class 11 notes are epithelial tissue, connective tissue muscle tissue, neural tissue, morphology and anatomy of earthworm, cockroaches, and frogs.

Chapter 8, Cell: The Unit of Life

The NCERT Class 11 chapter 8 notes are part of NCERT Class 11 unit 3 Cell: Structure and functions. NCERT Class 11 Biology chapter 8 notes deal with cellular structure and functioning. Cell: the unit of life Class 11 notes cover a brief outline of topics such as what is a cell, cell theory, prokaryotic cell, and eukaryotic cells. Some of the topics covered in a cell: the unit of life Class 11 notes are cell theory, cell envelope and its modifications, ribosomes and inclusion bodies, cell membrane, cell wall, endomembrane system, mitochondria, plastids, ribosomes, cytoskeleton, flagella, nucleus, and microbodies.

Chapter 9, Biomolecules

The NCERT Class 11 chapter 9 notes are a part of NCERT Class 11 unit 3 Cell: Structure and functions. NCERT Class 11 Biology chapter 9 notes deal with structure, types and importance of biomolecules. Biomolecules Class 11 notes cover a brief outline of topics such as analysis of chemical composition, primary and secondary metabolites, biomacromolecules, proteins, polysaccharides, nucleic acids, structure of proteins, dynamic state of body constituents-concept of metabolism and enzymes. Some of the topics covered in Biomolecules Class 11 notes are overview of different categories of biomolecules, biomacromolecules, nature of bond linking monomers in a polymer, concept of metabolism, metabolic basis for living, working of enzymes, nature of enzyme action, classification of enzymes, and co-factors.

Chapter 10, Cell Cycle and Cell Division

The NCERT Class 11 chapter 10 notes are a part of NCERT Class 11 unit 3 Cell: Structure and functions. NCERT Class 11 Biology chapter 10 notes deal with cell division and its steps. Cell cycle and cell division Class 11 notes cover a brief outline of topics such as cell cycle, M phase, significance of mitosis, meiosis and significance of meiosis. Some of the topics covered in Cell cycle and cell division Class 11 notes are phases of cell cycle, prophase, metaphase, anaphase, telophase, cytokinesis, meiosis I and II.

Chapter 11, Transport in Plants

The NCERT Class 11 chapter 11 notes are a part of NCERT Class 11 unit 4 Plant physiology. NCERT Class 11 Biology chapter 11 notes deal with uptake and transport of water, mineral nutrients, and food in plants. Transportation in plants Class 11 notes cover a brief outline of topics such as means of transport, plant water relations, xylem transport, transpiration, and phloem transport. Some of the topics covered in transport in plants Class 11 notes are active and passive transport, water potential, osmosis, plasmolysis, uptake, and translocation of mineral ions, and mass flow hypothesis.

Chapter 12, Mineral Nutrition

The NCERT Class 11 chapter 12 notes are a part of NCERT Class 11 unit 4 Plant physiology. NCERT Class 11 Biology chapter 12 notes deal with importance, uptake, and metabolism of minerals by plants. Mineral nutrition Class 11 notes cover a brief outline of topics such as methods to study the mineral requirements of plants, essential mineral elements, mechanism of absorption of elements, translocation of solutes, soil as a reservoir of essential elements, metabolism of nitrogen. Some of the topics covered in Mineral nutrition Class 11 notes are criteria for essentiality, the role of macro and micronutrients, deficiency and toxicity, nitrogen cycle, and biological nitrogen fixation.

Chapter 13, Photosynthesis in Higher Plants

The NCERT Class 11 chapter 13 notes are a part of NCERT Class 11 unit 4 Plant physiology. NCERT Class 11 Biology chapter 13 notes deal with discovery, site, and mechanism of photosynthesis. Photosynthesis in higher plants Class 11 notes cover a brief outline of topics such as early experiments, site of photosynthesis, pigments involved in photosynthesis, light reaction, electron transport, C4 pathway, photorespiration, and factors affecting photosynthesis. Some of the topics covered in Photosynthesis in higher plants Class 11 notes are early experiments regarding photosynthesis, light and dark reactions, cyclic and non-cyclic photophosphorylation, chemiosmotic hypothesis, use of ATP, and NADPH, Calvin cycle, C4 pathway, and factors affecting photosynthesis.

Chapter 14, Respiration in Plants

The NCERT Class 11 chapter 14 notes are a part of NCERT Class 11 unit 4 Plant physiology. NCERT Class 11 Biology chapter 14 notes deal with pathway of anaerobic and aerobic respiration. Respiration in plants Class 11 notes cover a brief outline of topics such as glycolysis, fermentation, and aerobic respiration. Some of the topics covered in Respiration in plants class 14 notes are concept of respiration, steps of glycolysis, fermentation, tricarboxylic acid cycle, electron transport chain and oxidative phosphorylation, respiratory balance sheet, amphibolic pathway and respiratory quotient.

Chapter 15, Plant Growth and Development

The NCERT Class 11 chapter 15 notes are a part of NCERT Class 11 unit 4 Plant physiology. NCERT Class 11 Biology chapter 15 notes deal with growth and development phenomena in higher plants. Plant growth and development Class 11 notes cover a brief outline of topics such as growth, differentiation, dedifferentiation, redifferentiation, development, plant growth regulators, photoperiodism, and vernalization. Some of the topics covered in plant growth and development Class 11 notes are phases of growth, growth rate, physiological effects of plant growth regulators, photoperiodism, and vernalization.

Chapter 16, Digestion and Absorption

The NCERT Class 11 chapter 16 notes are a part of NCERT Class 11 unit 5 Human physiology. NCERT Class 11 Biology chapter 16 notes deal with structure and function of the human digestive system. Digestion and absorption Class 11 notes cover a brief outline of topics such as human digestive system, digestion of food, absorption of digested food products and disorders of digestive system. Some of the topics covered in digestion and absorption Class 11 notes are digestive glands, digestion of food and disorders of digestive system.

Chapter 17, Breathing and Exchange of Gases

The NCERT Class 11 chapter 17 notes are a part of NCERT Class 11 unit 5 Human physiology. NCERT Class 11 Biology chapter 17 notes deal with structure and function of the human respiratory system. Breathing and exchange of gases Class 11 notes cover a brief outline of topics such as respiratory organs, mechanism of breathing, exchange of gases, transport of gases, regulation of respiration and disorders of respiratory system. Some of the topics covered in breathing and exchange of gases Class 11 notes are human respiratory system, respiratory volumes and capacities, transport of oxygen and transport, regulation and disorders of respiratory system.

Chapter 18, Body Fluids and Circulation

The NCERT Class 11 chapter 18 notes are a part of NCERT Class 11 unit 5 Human physiology. NCERT Class 11 Biology chapter 18 notes deal with structure and function of the human circulatory system. Body fluids and circulation Class 11 notes cover a brief outline of topics such as blood, lymph, circulatory pathways, double circulation, regulation of cardiac activity and disorders of circulatory system. Some of the topics covered in Body fluids and circulation Class 11 notes are blood, blood groups, coagulation of blood, human circulating system, cardiac cyle, double circulation, regulation and disorders of cardiac system.

Chapter 19, Excretory Products and Their Elimination

The NCERT Class 11 chapter 19 notes are a part of NCERT Class 11 unit 5 Human physiology. NCERT Class 11 Biology chapter 19 notes deal structure and function of the human excretory system. Excretory products and their elimination Class 11 notes cover a brief outline of topics such as human excretory system, urine formation, mechanism of concentration of the filtrate, regulation of kidney function, micturition, role of other organs in excretion and disorders of excretory system.

Chapter 20, Locomotion and Movement

The NCERT Class 11 chapter 20 notes are a part of NCERT Class 11 unit 5 Human physiology. NCERT Class 11 Biology chapter 1 notes deal with structure and function of the human muscular and skeletal system. Locomotion and movement Class 11 notes cover a brief outline of topics such as types of movement, muscle, skeletal system, joints, and disorders of muscle and skeletal system.

Chapter 21, Neural Control and Coordination

The NCERT Class 11 chapter 21 notes are a part of NCERT Class 11 unit 5 Human physiology. NCERT Class 11 Biology chapter 21 notes deal with the structure and function of the human nervous system. Neural control and coordination Class 11 notes cover a brief outline of topics such as the nervous system, structure and functioning of neurons, the structure of the brain, and sensory responses. Some of the topics covered in neural control and coordination Class 11 notes are the human neural system, impulse transmission, reflex action, sensory mechanism of the eye and ear.

Chapter 22, Chemical Coordination and Integration

The NCERT Class 11 chapter 22 notes are a part of NCERT Class 11 unit 5 Human physiology. NCERT Class 11 Biology chapter 1 notes deal with the structure and function of the human endocrine system. Chemical control and coordination Class 11 notes cover a brief outline of topics such as endocrine glands and hormones, human endocrine system, hormones of heart, kidney, and gastrointestinal tract, and mechanism of hormone action. Endocrine glands covered in chemical control and coordination Class 11 notes are the hypothalamus, pituitary gland, pineal gland, thyroid gland, parathyroid gland, thymus, adrenal gland, pancreas, testis, and ovary.

Subject Wise NCERT Solutions

• NCERT Solutions for Class 11 Mathematics
• NCERT Solutions for Class 11 Chemistry
• NCERT Solutions for Class 11 Physics

NCERT Books and Syllabus