NCERT Solutions For Class 11 Biology All Chapters - 2025-26

The NCERT Solutions for Class 11 Biology provide comprehensive coverage of essential topics, guiding students through the core concepts of the subject. Each chapter offers detailed explanations, diagrams, and examples, helping students understand everything from the basic unit of life to complex ecological interactions. These solutions are a valuable resource for mastering the fundamentals of biology and preparing for exams. Explore the chapter-wise breakdown to enhance your understanding and excel in your studies.

Chapter 1: The Living World

• This chapter provides an overview of natural flora and animals.

• The chapter discusses Diversity in the living world, taxonomic categories and more before introducing students to the crucial topic of genus and species classification. 

• This chapter led into the intriguing world of living organisms, where they discover previously unknown information about their surroundings and habits. 

Students can also download additional study materials provided by Vedantu for Chapter 1 of CBSE NCERT Class 11 Biology Solutions-

Chapter 2: Biological Classification

• This chapter delves deeper into a biological classification for the student. 

• The classification of the five kingdoms is explained in a simple and straightforward manner. Kingdoms addressed in this chapter include Kingdom Monera, Kingdom Protista, Kingdom Fungi, Kingdom Plantae, and Kingdom Animalia. 

• Students will also look at how experts like Aristotle and Linnaeus used previous classification systems, as well as how the system has evolved through time.

Along with this, students can also download additional study materials provided by Vedantu for Chapter 2 of CBSE Class 11 Biology Solutions-

Chapter 3: Plant Kingdom

• The students dig into the specifics of the world as it has been categorised thus far in this chapter. 

• They investigate the further classification of the plant kingdom in order to make it easier to study.

• Students will have a solid grasp of the concepts such as Algae, Bryophytes, Pteridophytes, Gymnosperms, Angiosperms, Alterations of Generations and Plant Life Cycles. 

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 3 of CBSE Class 11 Biology Solutions-

Chapter 4: Animal Kingdom

• The most important Kingdom, Animalia, is the subject of this chapter. Despite their differences in shape and structure, they all have some features that let us categorise them efficiently. The phyla Porifera, Coelenterata (Cnidaria), Ctenophora, Platyhelminthes, Aschelminthes, Annelida, Arthropoda, Mollusca, Echinodermata, Hemichordata, and Chordata will be studied thoroughly in this chapter.  

• This chapter has a 14 percent weightage in the NEET test and a 7-point weightage in the final exam, making it quite important from the point of view of exams.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 4 of CBSE Class 11 Biology Solutions-

Chapter 5: Morphology of Flowering Plants

• Any serious attempt to categorise and observe any higher plant (or, in the case of living organisms, any living being) needs familiarity with conventional technical nomenclature and definitions. 

• We must also examine variations in other components found as plant adaptations to their environment, such as adaptations to varied habitats, for protection, climbing, and storage. 

• This chapter also covers the root, stem, leaf, inflorescence, flower, fruit, and seed, as well as a semi-technical description of a typical blooming plant and many important plant families.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 5 of CBSE Class 11 Biology Solutions-

Chapter 6: Anatomy of Flowering Plants

• This chapter discusses the internal structure and functional connections of higher plants. Plants have cells as their basic building blocks, and these cells are organised into tissues, which are organised into various sections of the plant. 

• Within angiosperms, monocots and dicots are physically different. Internal structures, like external structures, vary in reaction to various conditions. 

• The Tissues, The Tissue System, Anatomy of Dicotyledonous and Monocotyledonous Plants, Secondary Growth, and so on are all covered in this chapter.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 6 of CBSE Class 11 Biology Solutions-

Chapter 7: Structural Organisation in Animals

• In this chapter, students will study multicellular creatures, unlike unicellular organisms, that have tissues with well-organised cells that execute a variety of functions. Complex animals are made up of four basic types of tissues which are organised in specific locations to form organs.

• This concludes Unit 2, Structural Organisation in Plants and Animals, which is worth 5% of your NEET score and 12 points in the final Biology exam.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 7 of CBSE Class 11 Biology Solutions-

Chapter 8: Cell The Unit of Life

• This chapter instructs students on important topics,  Prokaryotic and Eukaryotic cells are discussed in this chapter. 

• The membrane-bound and non-membrane-bound organelles that make up a cell are taught to the students. 

• They also learn about their structure and function with the help of insightful pictures. The students also learn about the many biologists who have made major contributions to the field.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 8 of CBSE Class 11 Biology Solutions-

Chapter 9: Biomolecules

• This chapter discusses biomolecules, their roles and structures, and why they are important in this chapter. 

• This chapter also explains metabolites and biomacromolecules, proteins, Structure of Proteins, Nucleic Acids, Polysaccharides and enzymes. 

• The critical role enzymes play in biological processes are also explained. 

• The topics excluded are: Dynamic State of Body constituents, the Nature of Bond Linking in Monomers in a Polymer, Concepts of Metabolism, The Living State, Metabolic basis of Living. 

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 9 of CBSE Class 11 Biology Solutions-

Chapter 10: Cell Cycle and Cell Division

• This chapter introduces the student to the fundamental principles of the cell cycle and cell division. 

• After studying this chapter, they will be aware of the differences between meiosis and mitosis, as well as their significance. 

• This chapter explains the stages of the cell cycle, such as Interphase, Prophase, Metaphase, Anaphase, Telophase, and Cytokinesis. 

• With this chapter, Unit 3: Cell Structure and Functions comes to a conclusion. 

• It is worth 9% of the NEET score and 15 points in the final exam.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 10 of CBSE Class 11 Biology Solutions-

Chapter 11: Photosynthesis in Higher Plants

• This chapter explains about the plants that are the only food supply for all living organisms, including humans and also about the Photosynthesis. 

• Photosynthesis is important for two reasons: it moulds and creates the basis for all realised food chains on the planet. 

• This chapter covers the design of photosynthetic mechanisms as well as the many processes that transform light energy into chemical energy.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 11 of CBSE Class 11 Biology Solutions-

Chapter 12: Respiration in Plants

• This chapter explains the glycolytic pathway, the steps involved in glycolysis, the role of enzymes in glycolysis and the conversion of glucose to pyruvate.

• Types of fermentation: alcoholic and lactic acid fermentation are also discussed in this chapter. 

• The Citric Acid Cycle (Krebs Cycle), Electron Transport System (ETS), and oxidative phosphorylation, along with the Amphibolic Pathway, are explained in this chapter. 

• The students are exposed to the latter in this chapter through this chapter. Some of the new terminology and ideas they will encounter are aerobic and anaerobic respiration, glycolysis, fermentation, the electron transport system, and the tricarboxylic acid cycle.

• Through this chapter, students gain a comprehensive insight into how plants convert biochemical energy from nutrients into ATP, which is essential for various physiological processes.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 12 of CBSE Class 12 Biology Solutions-

Chapter 13: Plant Growth and Development

• In this chapter, students will reflect on the various internal and external factors that impact a plant's growth and development. 

• Plant development phases, growth regulators, differentiation, dedifferentiation, redifferentiation, Vernalization, photoperiodism, Plant Growth Regulators, and seed dormancy will all be explored. 

• Plant hormones and their involvement in plant growth and development are also covered. 

• With this chapter, Unit 4: Plant Physiology comes to a conclusion. It is worth 18 points in the final Biology exam and has a 6% weightage in NEET.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 13 of CBSE Class 11 Biology Solutions-

Chapter 14: Breathing and Exchange of Gases

• This chapter introduces students to the concept of breathing and explains the distinctions between it and respiration.

• This chapter focuses on the respiratory system and the organs that make it up. The movement and exchange of gases such as oxygen and carbon dioxide are discussed in detail.

• Additionally, the students are educated about a variety of common respiratory diseases as well as their causes.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 14 of CBSE Class 11 Biology Solutions-

Chapter 15: Body Fluids and Circulation

• This chapter discusses the organisation and properties of blood and lymph (tissue fluids), as well as the mechanism of blood dispersion. 

• Students can learn more about Blood Composition, Blood Groups and the process of Coagulation of Blood from this chapter.

• Circulatory Pathways of different animals, along with the Human Circulatory System and Disorders of the Circulatory System, are discussed in this chapter.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 15 of CBSE Class 11 Biology Solutions-

Chapter 16: Excretory Products and their Elimination

• Given that the students had just dealt with gaseous waste in the previous chapter, it's only natural that they'd be curious about the elimination of solid and liquid waste produced by metabolic processes or excessive intake. 

• As a result, the excretory system in humans is the subject of this chapter. Students learn about the many components of the excretory system, including the auxiliary organs. 

• They study the process of urine generation and kidney function regulation, as well as numerous kidney diseases.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 16 of CBSE Class 11 Biology Solutions-

Chapter 17: Locomotion and Movement

• This chapter Provides a detailed understanding of locomotion and movement in organisms, focusing on the structure and function of muscles and the skeletal system, as well as the mechanisms underlying muscle contraction and various types of movements.

• Students can understand the significance of locomotion and movement in living organisms.

• Detailed examination of muscular and skeletal movements and an Overview of the structure and function of the skeletal system are present in this chapter. 

• Mechanism of Muscle Contraction, Muscle Fibres and Their Types, and Disorders Related to Muscles and Skeletons are a few other topics discussed in this chapter. 

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 17 of CBSE Class 11 Biology Solutions-

Chapter 18: Neural Control and Coordination

• We discover in this chapter that coordination is the mechanism through which at least two organs interact and augment each other's components. 

• Our body's neurological and endocrine frameworks work together to coordinate and incorporate all organ processes so that they all run smoothly. 

• This chapter covers human brain architecture, neural coordinating tools such as nerve impulse transmission, impulse conduction across a synapse, and the physiology of reflex response.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 18 of CBSE Class 11 Biology Solutions-

Chapter 19: Chemical Coordination and Integration

• The endocrine and exocrine glands that reside in organisms are discussed in this chapter.

• The human endocrine system, the hormones it produces, its actions, and illnesses caused by excess or lack of these hormones are all given specific consideration.

• The mechanism of hormone action, as well as the feedback mechanism that governs hormone production, are taught to students. Unit 5, Human Physiology, comes to an end with this chapter.

• It has a 20 percent weightage in NEET and 18 points in the final exam.

Along with this, students can also download additional study materials provided by Vedantu, for Chapter 19 of CBSE Class 11 Biology Solutions-

Marking Scheme for CBSE Biology Class 11 - 2024-25

Below, students can find the distribution of marks for the CBSE Class 11 Biology Syllabus as depicted in the table.

Benefits of NCERT Class 11 Biology Solutions PDF

Students experience many advantages when they download the file containing Biology NCERT Class 11 solutions. Some of those benefits are:

• There are 19 chapters in the syllabus. You will get 19 different files for the exercise solutions dedicated to all the chapters. 

• All solutions are completely accurate and written in points. This ensures that students are able to understand the text easily.

• You can download the files according to study sessions and store them on your smart devices. Refer to the solutions following your study schedules and make them more productive.

• At Vedantu, we have a team of highly experienced teachers who are experts in their fields. These expert teachers work on all solutions.

• All solutions are written according to the CBSE guidelines. This will allow the students to score the highest possible marks.

• Students often find the task of solving questions very tedious. But we at Vedantu have adopted a unique approach that makes learning and solving questions fun for students.

• Refer to the solutions whenever you are facing any doubt related to the exercise questions. The solutions will give you accurate answers to all the questions included in the exercises. 

• Solutions come with tips and exam strategies that students can follow to get the most out of their time.

• Follow the answering formats compiled by the experts to develop precise answering skills. In this way, you will learn how to keep your answers to the point and score more in the final exam.

NCERT Solutions for Class 11 Biology are essential resource for mastering the subject. They provide clear, comprehensive explanations and ample practice exercises, aligning perfectly with the CBSE curriculum. These solutions simplify complex concepts, enhance exam preparation, and are freely accessible, making them invaluable for all students. Utilising these resources fosters a deeper understanding and boosts academic success in biology.

Are you interested in experiencing those same benefits and more? If so, then download the Vedantu app today!

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