Class 11th

Download CBSE Class 11 Syllabus Biology for 2020-21 (New syllabus)

Biology is an elective subject for the class 11th Science stream students. Its syllabus includes both: theory and practical. Before you begin your studies, you must refer to the detailed syllabus and the marks distribution scheme.

So, we have the updated CBSE Class 11 Syllabus Biology here for our readers. You can get the revised syllabus with the list of deleted topics here on our page. We provide the latest information for Class 11 and 12 students and the CA students. 

30% reduction in CBSE class 11 syllabus biology

CBSE Class 11 Biology Weightage (2020-21) 

CBSE Class 11 Weightage Biology Theory 

IDiversity of Living Organisms15
IIStructural Organization in Plants and Animals8
IIICell: Structure and Function15
IVPlant Physiology15
VHuman Physiology17

CBSE Class 11 Weightage Biology Practical

Evaluation SchemeMarks
One Major Experiment Part A (Experiment No- 1,3)5
One Minor Experiment Part A (Experiment No- 4,5, 6)4
Slide Preparation Part A (Experiment No- 2)5
Spotting Part B7
Practical Record + Viva VoceCredit to the students’ work over the academic session may be given4
Practical Record + Viva Voce5

CBSE Class 11 Syllabus Biology for Theory (2020-21)

CBSE has announced a 30% deletion of topics in the class 11 Biology Syllabus for 2020-21. The decision is made due to the outspread of the Novel Coronavirus.

Many students have been confused about the new syllabus and deleted topics. So below in the tables, we have given the detailed and new CBSE Biology syllabus for class 11. You can also find the deleted topics given separately. So, get your books and start marking/highlighting them.  To download the PDF versions, visit our CBSE Class 11 Syllabus page.  You should also download the CBSE class 11 sample papers for practice.

Download the PDF of class 11 syllabus Biology for 2020-21

Unit I: Diversity of Living Organisms

Chapter 1- The Living World

Topics covered in SyllabusDeleted Topics
What is living? Biodiversity; Need for classification; three domains of life; concept of species and taxonomical hierarchy; binomial nomenclature. taxonomy and systematics;  tools for study of taxonomy- museums, zoological parks, herbaria, botanical gardens, keys for identification.

Chapter 2- Biological Classification

Topics covered in SyllabusDeleted Topics
Five kingdom classification; Salient features and classification of Monera, Protista and Fungi into major groups; Lichens, Viruses and Viroids.– – –

Chapter 3- Plant Kingdom

Topics covered in SyllabusDeleted Topics
Salient features and classification of plants into major groups – Algae, Bryophyta, Pteridophytes and Gymnosperms. (salient and distinguishing features and a few examples of each category).Angiospermae; Angiosperms – classification up to class, characteristic features and examples.

Chapter 4- Animal Kingdom

Topics covered in SyllabusDeleted Topics
Salient features and classification of animals, non-chordates up to phyla level and chordates up to class level (salient features and distinguishing features of a few examples of each category). (No live animals or specimen should be displayed.)– – –

Unit II: Structural Organizations in Animals and Plants

Chapter 5- Morphology of Flowering Plants

Topics covered in SyllabusDeleted Topics
Morphology of inflorescence and flower, Description of 01 families: Solanaceae or Liliaceae (to be dealt with along with the relevant experiments of the Practical Syllabus).Morphology and modifications: Morphology of different parts of flowering plants: root, stem, leaf, fruit and seed.  Description of families: – Fabaceae

Chapter 6-Anatomy of Flowering Plants

Deleted Topics
Anatomy and functions of different tissues and tissue systems in dicots and monocots. Secondary growth.

Chapter 7- Structural Organization in Animals

Topics covered in SyllabusDeleted Topics
Animal tissues. Morphology, Anatomy, and functions of different systems (digestive, circulatory, respiratory, nervous and reproductive) of an insect (cockroach), (a brief account only).

Unit III: Cell: Structure and Function

Chapter 8- Cell-The Unit of Life

Topics covered in SyllabusDeleted Topics
Cell theory and cell as the basic unit of life, 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

Topics covered in SyllabusDeleted Topics
Chemical constituents of living cells: biomolecules, structure and function of proteins, carbohydrates, lipids, nucleic acids; Enzymes- types, properties, enzyme action.– – –

Chapter 10- Cell-The Unit of Life

Topics covered in SyllabusDeleted Topics
Cell cycle, mitosis, meiosis and their significance– – –

Unit IV: Plant Physiology

Chapter 11- Transport in Plants

Deleted Topics
Movement of water, gases and nutrients; cell to cell transport, diffusion, facilitated diffusion, active transport; plant-water relations, imbibition, water potential, osmosis, plasmolysis; long distance transport of water – Absorption, apoplast, symplast, transpiration pull, root pressure and guttation; transpiration, opening and closing of stomata; Uptake and translocation of mineral nutrients – Transport of food, phloem transport, mass flow hypothesis.

Chapter 12- Mineral Nutrition

Deleted Topics
Essential minerals, macro- and micronutrients and their role; deficiency symptoms; mineral toxicity; elementary idea of hydroponics as a method to study mineral nutrition; nitrogen metabolism, nitrogen cycle, biological nitrogen fixation.

Chapter 13- Photosynthesis in Higher Plants

Topics covered in SyllabusDeleted Topics
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

Topics covered in SyllabusDeleted Topics
Exchange of gases; cellular respiration – glycolysis, fermentation (anaerobic), TCA cycle and electron transport system (aerobic); energy relations – number of ATP molecules generated; amphibolic pathways; respiratory quotient.– – –

Chapter 15- Plant-Growth and Development

Topics covered in SyllabusDeleted Topics
Growth regulators – auxin, gibberellin, cytokinin, ethylene, ABA. 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;  Seed dormancy; vernalisation; photoperiodism

Unit V: Human Physiology

Chapter 16- Digestion and Absorption

Deleted Topics
Alimentary canal and digestive glands, role of digestive enzymes and gastrointestinal hormones; Peristalsis, digestion, absorption and assimilation of proteins, carbohydrates and fats; calorific values of proteins, carbohydrates and fats; egestion; nutritional and digestive disorders – PEM, indigestion, constipation, vomiting, jaundice, diarrhoea.

Chapter 17- Breathing and Exchange of Gases

Topics covered in SyllabusDeleted Topics
Respiratory organs in animals (recall only); 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

Topics covered in SyllabusDeleted Topics
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 circulatory system – hypertension, coronary artery disease, angina pectoris, heart failure.– – –

Chapter 19- Excretory Products and their Elimination

Topics covered in SyllabusDeleted Topics
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; role of other organs in excretion; disorders – uremia, renal failure, renal calculi, nephritis; dialysis and artificial kidney, kidney transplant.– – –

Chapter 20- Locomotion and Movement

Topics covered in SyllabusDeleted Topics
Skeletal muscle, contractile proteins and muscle contraction.Types of movement – ciliary, flagellar, muscular;  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

Topics covered in SyllabusDeleted Topics
Neuron and nerves; Nervous system in humans – central nervous system; peripheral nervous system and visceral nervous system; generation and conduction of nerve impulse. reflex action; sensory perception; sense organs; elementary structure and functions of eye and ear

Chapter 22- Chemical Coordination and Integration

Topics covered in SyllabusDeleted Topics
Endocrine glands and hormones; human endocrine system – hypothalamus, pituitary, pineal, thyroid, parathyroid, adrenal, pancreas, gonads; mechanism of hormone action (elementary idea); role of hormones as messengers and regulators, hypo – and hyperactivity and related disorders; dwarfism, acromegaly, cretinism, goiter, exophthalmic goiter, diabetes, Addison’s disease. Note: Diseases related to all the human physiological systems to be taught in brief.– – –

CBSE Class 11 Syllabus Biology for Practical (2020-21)

Topics Covered in Biology Practical Syllabus

A: List of Experiments 

  1. Study and describe a locally available common flowering plant, from any one family: Solanaceae or Liliaceae (Poaceae, Asteraceae or Brassicaceae can be substituted in case of particular geographical location) including dissection and display of floral whorls, anther and ovary to show number of chambers (floral formulae and floral diagrams). 
  2. Study of distribution of stomata in the upper and lower surfaces of leaves. 
  3. Separation of plant pigments through paper chromatography. 
  4. Study of the rate of respiration in flower buds/leaf tissue and germinating seeds. 
  5. Test for presence of sugar in urine. 
  6. Test for presence of albumin in urine. 

B. Study/Observer of the following (spotting) 

  1. Parts of a compound microscope. 
  2. Specimens/slides/models and identification with reasons – Bacteria, Oscillatoria, Spirogyra, Rhizopus, mushroom, yeast, liverwort, moss, fern, pine, one monocotyledonous plant, one dicotyledonous plant and one lichen. 
  3. Virtual specimens/slides/models and identifying features of – Amoeba, Hydra, liverfluke, Ascaris, leech, earthworm, prawn, silkworm, honeybee, snail, starfish, shark, rohu, frog, lizard, pigeon and rabbit. 
  4. Tissues and diversity in shape and size of animal cells (squamous epithelium, smooth, skeletal and cardiac muscle fibers and mammalian blood smear) through temporary/permanent slides. 
  5. Mitosis in onion root tip cells and animal cells (grasshopper) from permanent slides.

Deleted Topics from CBSE Class 11 Syllabus Biology Practical 

A: List of Experiments 

  1. Description of Family Fabaceae; Types of root (Tap and adventitious); types of stem (herbaceous and woody); leaf(arrangement, shape, venation, simple and compound). 
  2. Preparation and study of T.S. of dicot and monocot roots and stems (primary) 
  3. Study of osmosis by potato osmometer. 
  4. Study of plasmolysis in epidermal peels (e.g. Rhoeo/lily leaves or flashy scale leaves of onion bulb). 
  5. Comparative study of the rates of transpiration in the upper and lower surface of leaves. 
  6. Test for the presence of sugar, starch, proteins and fats in suitable plant and animal materials. 
  7. Test for presence of urea in urine. 
  8. Test for presence of bile salts in urine. 

B. Study/Observation of the following (spotting) 

  1. Tissues and diversity in shape and size of plant cells (palisade cells, guard cells, parenchyma, collenchyma, sclerenchyma, xylem and phloem) through temporary and permanent slides. 
  2. Different modifications in roots, stems and leaves. 
  3. Different types of inflorescence (cymose and racemose). 
  4. Human skeleton and different types of joints with the help of virtual images/models only.

Frequently Asked Questions

Q1. What is the CBSE class 11 syllabus Biology?

Ans. CA Wizard has given the entire CBSE class 11 Biology syllabus in this article. 

Q2. Which is the most recommended book for Biology in class 11?

Ans. NCERT books are prescribed for Biology subject in CBSE board class 11. You can download the NCERT e-book for Biology from here.  

Q3. How many chapters are there in CBSE class 11 Biology? 

Ans. There are a total of 22 chapters in class 11 Biology subject. Although four chapters (6, 11, 12, and 16) have been removed from the syllabus and portions from the other chapters are also deleted. 

Q4. Is the CBSE class 11 syllabus Biology revised this year?

Ans. Yes, 30% of the syllabus is reduced in the Biology subject for the final exam of 2020-21.

Q5. How to download the latest CBSE class 11 Biology syllabus? 

Ans. You can download the CBSE class 11 Syllabus Biology from this article of CA Wizard. 

Q6. Which topics are removed from the class 11 chemistry syllabus?

Ans. The complete list of deleted topics from the class 11 Biology syllabus is given in this article.

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