NCERT Solutions for Class 11 Biology

NCERT Solutions for Class 11 Biology is written by expert faculty members of Physics Wallah having decade of teaching experience. There are 22 chapters in NCERT text book of class 11 Biology. Each chapter having one or two exercise having questions from 15 to 35. Our team solved all questions with required information and diagram as per the requirement of CBSE.

Right strategy for the preparation of school exam with NEET starts from class 11. With proper mix of NCERT text book and reference book. For a student career class 11 is very important and must have clear strategies to excel.

Do you know about 85 percent questions asked in NEET 2019 are directly from NCERT text book. Out of this about 45 percent form NCERT class 11 text book and rest 65 form NCERT text book of class 12. This data explains the important of NCERT class 11 Biology text book importance. With Physics Wallah NCERT Solutions for class 12 Biology you will be ready will for all challenge.

NCERT Solutions for Class 11 Biology Chapters (Updated 2022-23)

NCERT Solutions for Class 11 Biology Free PDF Download

NCERT solutions for class 11 Biology

Chapter- 1 The Living World

This chapter elaborates on basic concepts such as “What is living? Diversity in the living world, taxonomic categories, taxonomic aids, and more. The living world is rich in diversity. Millions of plant and animal species have been identified and described, but countless more remain to be discovered. Taxonomic studies of different species of plants and animals are useful in agriculture, forestry, industry, and general to know our resources and their diversity. Taxonomists have developed a taxonomic aids to facilitate the identification, naming, and classification of organisms.

Chapter- 2 Biological Classification

In this chapter, you will discuss about the characteristics of the Kingdoms Monera, Protista, and Fungi classification system of Whittaker. Kingdoms Plantae and Animalia, commonly referred to as the plant and animal kingdoms, respectively, will be covered separately in Chapters 3 and 4. You will also learn about Kingdom Monera, Protista, Kingdom Fungi, Kingdom Plantae, Kingdom Animalia, Viruses, Viroids, and Lichens in biological classification.

Chapter- 3 Plant Kingdom

In chapter 2, we learned about the broad classification of living organisms according to the system proposed by Whittaker (1969), where he proposed a classification of five kingdoms, viz. Monera, Protista, Fungi, Animalia and Plantae. This chapter will discuss about another classification within the Kingdom Plantae or 'plant kingdom.' You will also learn about algae, bryophytes, angiosperms, gymnosperms, plant life cycles, and the alternation of generations.

Chapter- 4 Animal Kingdom

We observe different animals with different formas and structures when we look around us. Over a million species of animals have been described so far, making the need for classification all the more important. The classification also helps in assigning a systematic position to newly described species. It also discusses other topics such as the Basics of classification, Classification of animals, and others. In this chapter, students will be briefly introduced to the animal kingdom.  The classification of animals and  Salient features, non-chordates up to phyla level, and chordates up to class level (salient features and a few examples of each category). (No live animals or specimens should be displayed.)

Chapter- 5 Morphology of Flowering Plants

In the chapters 2 and 3, we discuss the classification of plants based on morphological and other characteristics. For any successful attempt to classify and understand any higher plant (or any living organism), we need to know standard technical terms and definitions. We also need to know about possible variations in different parts, found as adaptations of plants to their environment, e.g., adaptation to different habitats for protection, climbing, and storage. Morphology of Flowering Plants further explains topics such as root, stem, leaf, inflorescence, flower, fruit, seed, description of some important families, semi-technical description of a typical flowering plant, and more.

Chapter- 6 Anatomy of Flowering Plants

This chapter presents the internal structure and functional organization of higher plants. The study of the internal structure of plants is called anatomy. Plants have cells as their basic unit, cells are organized into tissues, and tissues are organized into different parts of the plant. In angiosperms, monocots and dicots are anatomically different. Internal structures also show adaptations to different environments. This chapter covers Tissues, Tissue systems, the Anatomy of Dicotyledons and Monocotyledons, Secondary Growth, and more.

Chapter- 7 Structural Organisation in Animals

In the previous chapters, we discuss a large number of organisms, unicellular and multicellular, in the animal kingdom. In unicellular organisms, all functions, such as digestion, respiration, and reproduction, are performed by a single cell. In the multicellular animals, different groups of cells perform the same basic functions in a well-organized manner. All complex animals are made up of only four basic types of tissue. These tissues are organized in specific locations to form organs – such as the stomach, lungs, heart, and kidneys. Students can understand the structural organization of animals and score well in the exam by referring to the solutions available at Physics Wallah. This chapter covers the Morphology, Anatomy, and functions of different systems (digestive, circulatory, respiratory, nervous, and reproductive) of the frog.

Chapter- 8 Cell The Unit of Life

When you look around you, you see living things and non-living things. You must have asked yourself – "What feeds the organism? or, "What does an inanimate object not have that a living thing has?" The answer to this is the presence of the basic unit of life – the cell in all living organisms. All organisms are made up of cells. Some consist of a single cell and are called unicellular organisms. In contrast, others, like us, are made up of many cells called multicellular organisms. This chapter covers- Cell theory and cell as the basic unit of life, the structure of prokaryotic and eukaryotic cells; Plant cell and animal cell; cell envelope; cell membrane, cell wall; cell organelles – structure and function; endomembrane system, endoplasmic reticulum, Golgi bodies, lysosomes, vacuoles, mitochondria, ribosomes, plastids, microbodies; cytoskeleton, cilia, flagella, centrioles (ultrastructure and function); nucleus.

Chapter- 9 Biomolecules

There is a wide variety of living organisms in our biosphere. A few other topics covered in this chapter are How to Analyze Chemical Composition? Primary and Secondary Metabolites, Biomacromolecules, Proteins, Polysaccharides, Nucleic Acids, Structure of Proteins, Nature of Bond Linking Monomers in a Polymer, Dynamic State of Body Constituents – Concept of Metabolism, Metabolic Basis for Living, The Living State, Enzymes. Students will be able to get a good hold on these topics by referring to the NCERT Solutions for Class 11 Biology Chapter-9 Biomolecules from Physics Wallah.

Chapter- 10 Cell Cycle and Cell Division

Growth and reproduction are properties of cells, in fact, of all living organisms. All the cells reproduce by dividing into two, with each parent cell giving rise to two daughter cells each time it divides. These newly formed daughter cells can grow and divide independently, forming a new cell population that is create by the growth and division of a single parent cell and its progeny. In contrast, such cycles of division and growth allow a single cell to create a structure consisting of millions of cells. This chapter covers topics such as the Cell cycle, the M phase, the significance of mitosis, Meiosis, and the significance of Meiosis.

Chapter- 11 Transport in Plants

Topics in the Transport in Plants chapter include Means of Transport, Plant-Water Relationships, Transpiration, Uptake and Transport of Mineral Nutrients, Long Distance Transport of Water, Phloem, Transport: Flow from Source to Sink. Plants obtain various inorganic elements (ions) and salts from their surroundings, especially water and soil. In higher plants, there is a vascular system composed of xylem and phloem responsible for translocation. The phloem is responsible for transporting food (primarily) sucrose from the source to the sink. The pressure-flow hypothesis explains translocation in the phloem.

Chapter- 12 Mineral Nutrition

This chapter mainly focuses on inorganic plant nutrition, where we will study methods for identifying elements necessary for plant growth and development and criteria for determining essentiality. We will also study the role of essential elements, their main deficiency symptoms, and the mechanism of absorption of these essential elements. The Mineral Nutrition chapter also briefly introduces the significance and mechanism of biological nitrogen fixation.

Chapter- 13 Photosynthesis in Higher Plants

All animals, including humans that depend on plants for food. Green plants create or synthesize the food they need through photosynthesis, called autotrophs. Green plants perform "photosynthesis," a physicochemical process that uses light energy to synthesize organic compounds. Photosynthesis is important for two reasons: it forms the basis of all known food chains on Earth. It is then responsible for the release of oxygen into the atmosphere by green plants.

These chapters cover- Photosynthesis as a means of autotrophic nutrition; site of photosynthesis, pigments involved in photosynthesis (elementary idea); photochemical and biosynthetic phases of photosynthesis; cyclic and non-cyclic photophosphorylation; chemiosmotic hypothesis; photorespiration; C3 and C4 pathways; factors affecting photosynthesis.

Chapter- 14 Respiration in Plants

This chapter discusses cellular respiration or the mechanism of breaking down food materials in a cell to release energy and capture that energy for ATP synthesis. This chapter also covers topics such as “Do plants breathe? Glycolysis, Fermentation, Aerobic respiration, Respiratory balance, Amphibolic pathway, Respiratory quotient. The important concepts of this Respiration by Plants chapter are explained in simple language to make learning easier for class 11 students.

Chapter- 15 Plant Growth and Development

We have already studied the organization of the flowering plant in Chapter 5. This chapter will examine some of the factors that govern and control these developmental processes. These factors are both internal (internal) and external (external) plants. Other subtopics are Growth Differentiation, Dedifferentiation and Redifferentiation, Development, Plant Growth Regulators, Photoperiodism, Vernalization, and more. At Physics Wallah, highly experienced faculty designed plant growth and development solutions to help students pass the final exam. This chapter covers- Seed germination; phases of plant growth and plant growth rate; conditions of growth; differentiation, dedifferentiation, and redifferentiation; Sequence of developmental processes in a plant cell; growth regulators – auxin, gibberellin, cytokinin, ethylene, ABA.

Chapter- 16 Digestion and Absorption

Food is the basic requirements of all living organisms. The main components of our food are proteins, carbohydrates and fats. Both vitamins and minerals are also required in small amounts. Food provides energy and organic materials for tissue growth and repair. The water we take is plays an important role in metabolic processes and prevents organism dehydration. Our bodies cannot use the biomacromolecules in food in their original form. It must be broken down and converted into simple substances in the digestive system. This process of converting complex food substances into simple absorbable forms is called digestion, and our digestive system does it by mechanical and biochemical methods. These terms are briefly explained in the Digestion and Absorption chapter to help students understand them better.

Chapter- 17 Breathing and Exchange of Gases

As you read earlier, oxygen is used by organisms to indirectly break down simple molecules like glucose, amino acids, fatty acids, etc., to obtain energy to carry out various activities. Carbon dioxide is also released during the catabolic reactions mentioned above, which is harmful. So it is clear that oxygen must be continuously supplied to the cells, and carbon dioxide produced by the cells must be released outside. This process of exchanging oxygen from the atmosphere with carbon dioxide produced by cells is called respiration. This is also known as breathing. This chapter covers- Respiratory organs in animals, the Respiratory system in humans; mechanism of breathing and its regulation in humans – exchange of gases, transport of gases and regulation of respiration, respiratory volume; disorders related to respiration – asthma, emphysema, occupational respiratory disorders.

Chapter- 18 Body Fluids and Circulation

We have learned that all living cells must be supplied with nutrients, oxygen, and other essential substances. For the healthy functioning of the tissues, it is also necessary to continuously remove waste or harmful substances. Blood is the most generally used body fluid in most higher organisms, including humans. Another body fluid, lymph, also helps transport certain substances. In this chapter, we will discuss the composition of blood, blood groups, coagulation of blood; composition of lymph and its function; human circulatory system – Structure of human heart and blood vessels; cardiac cycle, cardiac output, ECG; double circulation; regulation of cardiac activity; disorders of the circulatory system – hypertension, coronary artery disease, angina pectoris, heart failure.

Chapter- 19 Excretory Products and their Elimination

The chapter covers topics such as the human excretory system, urine formation, tubule function, the mechanism of filtrate concentration, regulation of kidney function, micturition, the role of other organs in excretion, disorders of the excretory system, and more. This chapter covers- Modes of excretion – ammonotelism, ureotelism, uricotelism; human excretory system – structure and function; urine formation, osmoregulation; regulation of kidney function – renin-angiotensin, atrial natriuretic factor, ADH and diabetes insipidus; the role of other organs in excretion; disorders – uremia, renal failure, renal calculi, nephritis; dialysis and artificial kidney, a kidney transplant.

Chapter- 20 Locomotion and Movement

Movement is one of the distinctive characteristics of living beings. Animals and plants show a wide range of movements. Such voluntary movements are called locomotion. Walking, running, climbing, flying, and swimming are all forms of locomotor movement. Locomotory structures may not differ from those affecting other types of movement. The ways animals move vary according to their habitats and the demands of the situation. Locomotion is necessary for various reasons, such as the search for food, shelter, a mate, a suitable nesting site, favorable climatic conditions, or escape from predators. Topics covered in this chapter are- Types of movement – ciliary, flagellar, muscular; skeletal muscle, contractile proteins, and muscle contraction; skeletal system and its functions; joints; disorders of muscular and skeletal systems – myasthenia gravis, tetany, muscular dystrophy, arthritis, osteoporosis, gout.

Chapter- 21 Neural Control and Coordination

Coordination is a process in which two or more organs interact and complement each other's functions. In our body, the nervous and endocrine systems coordinate and integrate all the activities of the organs so that they work in a synchronized manner. In this chapter, we will learn about the human nervous system, the mechanisms of nervous coordination, the transmission of nerve impulses, the conduction of impulses through the synapse, and the physiology of reflex action.

Chapter- 22 Chemical Coordination and integration

We have already learned that the nervous system provides rapid point-to-point coordination between organs. Neural coordination is fast but short-lived. Because nerve fibers do not innervate all body cells and cellular functions must be constantly regulated; a special kind of coordination and integration must be ensured. Hormones perform this function. Both the nervous system and endocrine systems coordinate and regulate physiological functions in the body. Students can learn chemical coordination and integration more effectively with NCERT solutions from Physics Wallah. Topics covered in this chapter are- Endocrine glands and hormones; the human endocrine system – hypothalamus, pineal, thyroid, pituitary, parathyroid, adrenal, pancreas, gonads; mechanism of hormone action (elementary idea); role of hormones as messengers and regulators, hypo – and hyperactivity and related disorders; cretinism, goiter, exophthalmic goiter, dwarfism, acromegaly, diabetes, Addison’s disease.

CBSE Marking Scheme 2022-23

The academic sessions of the CBSE board are divided based on the syllabus for the year 2022-23. The entire syllabus is evenly divided so students can spend a lot of time and learn the basic concepts quickly. The main aim is to help the students understand the connections between concepts they have also learned in previous classes. It aims to provide board-conducted classes at the end of each academic year so students can effectively understand the topics.

Units Title Marks
I Diversity of Living Organisms: Chapter – 1, 2, 3 and 4 15
II Structural Organization in Plants and Animals: Chapter – 5, 6 and 7 10
III Cell: Structure and Function: Chapter – 8, 9 and 10 15
IV Plant Physiology: Chapter – 13, 14 and 15 12
V Human Physiology: Chapter –17, 18, 19, 20, 21 and 22 18
  Total Theory  70
  Practicals  30
  Total 100

How to start Class 11 Biology

Start your preparation with NCERT text book with NCERT solutions for class 11 Biology. Strat with the basics of class 11 Biology. Read first chapter of NCERT text book. Prepare your Notes form NCERT text book. While preparing notes form NCERT text book make sure you have added all important points given in class 11 biology section of Physics Wallah.

Do solve the MCQ given in Physics Wallah.Solve all questions mentioned in NCERT text book. Biology is subject of concept and diagram. While preparing Biology class 11 notes draw clear diagram mentioning all important points.

Tips to score Good Marks in Class 11 Biology

  1. Revision of the content is must to score good rank and marks in CBSE.
  2. Normally Students works hard just before the exam day which is very wrong strategy. If you study continuously in the pressure of exams and ultimate result is not satisfactory.
  3. Prepare the scheduled for one week and try to follow scheduled strictly.
  4. Divide the scheduled on the daily basis, fix the target on hour basis i.e number of questions should be completed in particular time frame. Or the particular topic should be covered in particular time frame.
  5. At the end of the day find out targets which you achieved. it will give you positive energy to complete the scheduled and to follow your daily targets.
  6. Every day you are achieving your daily targets. This will help you to achieve your final goal of getting good marks in your school exams as well as preparing yourself for competitive exams too.

Why Physics Wallah for Class 11 Biology

  1. It is very much essential for biology student who is aspiring for NEET along with wants a good performance in Board too that you have good command on diagrams of class 11th and 12th biology portion.
  2. In today’s scenario in NEET-UG very large section of questions have asked directly or indirectly on the diagrams and tables given NCERT books.
  3. Solve all questions of NCERT text book take help from NCERT Solutions For Class 11 Biology.
  4. A large no. of questions in JIPMER, AIIMS and NEET are based on Diagrams and content of NCERT tables, so keep it in mind, the importance of these.
  5. As you know class 11th content is very important, a student must learn with great interest, and make a habit of asking questions in regular class, never keep doubts with you.
  6. Doubts should be cleared as early as possible to achieve a great success, command and interest in particular subjects.
  7. You can take help from NCERT Solutions For Class 11 Biology.If you are not clearing your doubts on daily basis, they will accumulate day by day  and ultimately leads to development of fear with particular subject.
  8. On other side if you clear yours doubt on daily basis, it would create interest with subject and there would be no fear with subject as well as on exam days, you will love to attempt exams.
  9. Your handwritten notes play a vital role in achieving your goal of getting a good marks in CBSE too.
  10. Always prepare your own notes for every chapter, especially in case of biology there is no replacement of your own handwritten notes, use different colored pen to draw diagrams, topics, subtopics.
  11. Students you would be able to learn your class content in less time as compared to printed notes or notes taken from any other student, even you can revise and recall your whole chapter within few minutes if you are revising that from own handwritten notes.
  12. If you are in class 11th and preparing for UG Medical exams such as NEET, JIPMER, AIIMS and also willing to get good grades in CBSE exams then you should follow the all those points which we have discussed

Frequently Asked Question (FAQs)

Q1. What is the best way to us the NCERT textbook for class 11 Biology?

Ans. NCERT textbook is considered as one of the best books for class 11 Biology for CBSE board as well as for competitive entrance exams like NEET. In the year 2019, almost 90 percent of questions asked in NEET are directly from the NCERT textbook. The right approach to read the NCERT textbook is. Start from the first chapter read the theory given in the textbook and understand the concepts behind it.

Read the bullet points given in the boxes and try to prepare notes of all important points given in the textbook. Once you complete the theory part try to solve all questions given in the exercise of the textbook and use Physics Wallah NCERT Solutions for class 11 Biology for reference.

Q2. How NCERT class 11 biology can help me to score good marks in class 11?

Ans. In all most, all CBSE schools the recommend book is NCERT class 11 Biology. The syllabus of CBSE is well explained in NCERT textbooks. When you are preparing for your school exam either it is unit text or half-yearly or final exam questions are asked directly from NCERT exercise of theory parts.

Read all examples given in the textbook complete the exercise make your notes and solve all MCQ based questions given in the Exercise. You can do more practice form NCERT exemplar of NCERT it consists of very good quality questions which enhanced your learning and understanding in the chapter.

Q3. What are the most important chapters of class 11 biology in the NCERT textbook?

Ans. All chapter is equally important to build a solid foundation of class 11 biology still there are few topics which need more attention like Diversity in the living world, Cell structure, and functions, Structural organization in plants and Plant physiology, Reproduction in plants, Structural organization in animals, Human physiology, Human reproduction, Genetics, and Evolution is again very important and need time to understand, Biology and human welfare, Biotechnology and its applications, Ecology and Environment.

Q4. NCERT textbook is enough for a good foundation of class 11 Biology?

Ans. Yes NCERT textbook for class 11 Biology is self-sufficient and you don’t require any other reference book for your school as well as a competitive entrance exam. Read thoroughly the NCERT class 11 Biology textbook to have clarity in the concept try to note down important points and diagrams as well.

Q5. How to prepare notes to form the class 11 Biology textbook?

Ans. Notes are the most important and key part of Biology on which you must work. Preparing good quality notes will help you to achieve your goal and effective revision. Start preparing notes from the NCERT textbook as well as your school class make sure you are adding diagrams on your notes with proper tagging of important points and parts of diagram this will help you to remember the important points. Make a separate section for important points of chapter mentioning all-important points and information.

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