ICSE Class 9 Biology Syllabus 2026-27 — Complete Guide with 19 Chapters & Tips

What's New in 2026-27?

The ICSE Class 9 Biology syllabus for 2026-27 is extensive, covering 19 chapters that span the full breadth of biological sciences — from cell biology and plant physiology to human anatomy, diseases, and environmental management. CISCE continues to emphasise diagram-based questions, observation-based reasoning, and the application of biological concepts to health and environmental awareness. This is a content-heavy syllabus, so systematic study and consistent revision are essential.

Biology carries 80 marks for the theory examination and 20 marks for Internal Assessment (practical work). Duration: 2 hours.

Syllabus Overview

Category	Chapters	Key Topics
Cell Biology	Introducing Biology, Cell, Tissues	Cell organelles, prokaryotic/eukaryotic, plant/animal cells, tissue types
Plant Biology	The Flower, Pollination & Fertilisation, Seeds, Respiration in Plants	Flower structure, reproduction, seed types, aerobic/anaerobic
Diversity of Life	Five Kingdom Classification, Economic Importance of Bacteria & Fungi	Monera, Protista, Fungi, Plantae, Animalia
Human Biology	Nutrition, Digestive System, Movement & Locomotion, Skin, Respiratory System	Balanced diet, digestion, bones/muscles, skin functions, breathing
Health & Hygiene	Hygiene, Diseases, Aids to Health, Health Organisations	Personal/public hygiene, infectious diseases, first aid, WHO/Red Cross
Environment	Waste Management	Biodegradable/non-biodegradable, 3R, composting

Chapter-wise Detailed Syllabus

1. Introducing Biology

What is biology? Branches of biology — botany, zoology, ecology, genetics, microbiology, biotechnology. Scientific method — observation, hypothesis, experimentation, conclusion. Importance of biology in daily life. Basic laboratory equipment and their uses. Safety precautions in the biology laboratory.

2. The Cell — Unit of Life

Cell theory — Schleiden, Schwann, Virchow. Prokaryotic vs. Eukaryotic cells — structural differences. Plant vs. Animal cells — cell wall, chloroplast, vacuole, centrioles. Cell organelles and their functions: cell membrane (selectively permeable), nucleus (controls cell activities, contains DNA), mitochondria (powerhouse — ATP production), endoplasmic reticulum (smooth and rough), Golgi apparatus (packaging and secretion), ribosomes (protein synthesis), lysosomes (digestive enzymes), vacuoles, plastids (chloroplast, chromoplast, leucoplast).

3. Tissues

Plant Tissues: Meristematic (apical, lateral, intercalary) — actively dividing. Permanent — simple (parenchyma, collenchyma, sclerenchyma) and complex (xylem, phloem). Functions and locations of each.

Animal Tissues: Epithelial (squamous, cuboidal, columnar, ciliated), Connective (bone, cartilage, blood, adipose, areolar), Muscular (striated/skeletal, smooth/unstriated, cardiac), Nervous (neurons, neuroglia). Structure, location, and function of each type.

4. The Flower

Structure of a typical flower — pedicel, thalamus, sepals (calyx), petals (corolla), stamens (androecium — filament + anther), pistil/carpel (gynoecium — stigma + style + ovary). Complete vs. incomplete flowers. Bisexual vs. unisexual flowers. Actinomorphic vs. zygomorphic. Functions of each whorl. Placentation types.

5. Pollination and Fertilisation

Pollination: Self-pollination (autogamy) — features, advantages, disadvantages. Cross-pollination (allogamy) — agents (wind, insects, water, animals), features of wind-pollinated and insect-pollinated flowers. Advantages and disadvantages of cross-pollination.

Fertilisation: Pollen tube growth, double fertilisation — syngamy (zygote formation) and triple fusion (endosperm formation). Post-fertilisation changes — ovule → seed, ovary → fruit.

6. Seeds

Structure of a dicotyledonous seed (bean) — seed coat (testa, tegmen), hilum, micropyle, embryo (radicle, plumule, cotyledons). Structure of a monocotyledonous seed (maize) — endosperm, scutellum, coleoptile, coleorhiza. Differences between monocot and dicot seeds. Conditions for germination — water, oxygen, temperature. Epigeal and hypogeal germination.

7. Respiration in Plants

Respiration vs. photosynthesis — comparison. Aerobic respiration: Complete oxidation of glucose (C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy/ATP). Stages — glycolysis, Krebs cycle, electron transport chain (basic understanding). Anaerobic respiration: Fermentation — alcoholic (yeast) and lactic acid (muscles). Respiratory quotient (RQ).

8. Five Kingdom Classification

Need for classification. Whittaker's Five Kingdom system: Monera (bacteria — prokaryotic, cell wall, no nucleus), Protista (amoeba, paramecium, euglena — eukaryotic, unicellular), Fungi (yeast, mushroom, bread mould — eukaryotic, cell wall of chitin, heterotrophic), Plantae (autotrophic, cell wall of cellulose — thallophyta, bryophyta, pteridophyta, gymnosperms, angiosperms), Animalia (heterotrophic, multicellular, no cell wall). Key characteristics of each kingdom.

9. Economic Importance of Bacteria and Fungi

Bacteria: Beneficial — curd making (Lactobacillus), nitrogen fixation (Rhizobium), decomposition, antibiotics. Harmful — diseases (tuberculosis, cholera, typhoid), food spoilage.

Fungi: Beneficial — bread making (yeast), antibiotic production (Penicillium), decomposition, food (mushrooms). Harmful — diseases (ringworm, athlete's foot), crop diseases, food spoilage.

10. Nutrition

Balanced diet — carbohydrates, proteins, fats, vitamins, minerals, water, roughage. Functions and sources of each nutrient. Deficiency diseases — scurvy (Vitamin C), rickets (Vitamin D), beriberi (Vitamin B1), pellagra (Vitamin B3), night blindness (Vitamin A), anaemia (Iron), goitre (Iodine). Malnutrition — kwashiorkor, marasmus.

11. Digestive System

Alimentary canal — mouth (teeth, tongue, salivary glands), pharynx, oesophagus (peristalsis), stomach (gastric glands, HCl, pepsin), small intestine (duodenum, jejunum, ileum — villi), large intestine (absorption of water), rectum, anus. Digestive glands — salivary (amylase), gastric (pepsin, HCl), liver (bile), pancreas (pancreatic juice). Digestion of carbohydrates, proteins, and fats. Absorption and assimilation.

12. Movement and Locomotion

Types of movement — ciliary, flagellar, muscular. Human skeletal system — axial skeleton (skull, vertebral column, rib cage) and appendicular skeleton (limbs, girdles). Types of joints — fixed (skull), slightly movable (vertebrae), freely movable (hinge, pivot, ball-and-socket, gliding). Types of muscles — voluntary (skeletal), involuntary (smooth), cardiac. Tendons and ligaments.

13-15. Skin, Respiratory System, Hygiene

Skin: Structure — epidermis and dermis. Functions — protection, sensation, temperature regulation, excretion (sweat), vitamin D synthesis.

Respiratory System: Organs — nose, pharynx, larynx, trachea, bronchi, lungs (alveoli). Mechanism of breathing — inhalation and exhalation. Exchange of gases — diffusion in alveoli. Differences between inspired and expired air.

Hygiene: Personal hygiene — bathing, dental care, hand washing. Public hygiene — water treatment, sewage disposal, waste management. Importance of hygiene in disease prevention.

16-18. Diseases, Aids to Health, Health Organisations

Diseases: Communicable (infectious) — caused by bacteria (TB, cholera), viruses (common cold, dengue, COVID), fungi (ringworm), protozoans (malaria, amoebic dysentery). Non-communicable — diabetes, cancer, heart disease. Vectors — mosquito (malaria, dengue), housefly (cholera, typhoid).

Aids to Health: Vaccination and immunisation — Jenner's contribution, types of immunity (natural, acquired). First aid — fractures, burns, bleeding, snake bite, drowning. Antiseptics and disinfectants.

Health Organisations: WHO — objectives, programmes (polio eradication, malaria control). Red Cross — founder (Henry Dunant), functions. UNICEF — child health and welfare.

19. Waste Management

Types of waste — biodegradable and non-biodegradable. Sources — domestic, industrial, agricultural, biomedical. Methods of disposal — landfill, incineration, composting, recycling, vermicomposting. 3R principle — Reduce, Reuse, Recycle. Hazardous waste — e-waste, nuclear waste, biomedical waste. Importance of waste segregation.

Exam Pattern 2026-27

Component	Details	Marks
Section I	Compulsory short-answer questions from all chapters	40 marks
Section II	Answer 4 out of 6 structured/long-answer questions	40 marks
Internal Assessment	Practical work, project, periodic tests	20 marks
Total		100 marks

Prescribed Textbooks

• Concise Biology Class 9 — Selina Publishers
• ICSE Biology for Class 9 — S. Chand Publishers
• Frank ISC Biology Class 9 — Frank Brothers

Preparation Tips

1. Master cell biology first — Cell structure and functions form the foundation for all subsequent chapters. Draw and label plant and animal cells until you can do it from memory.
2. Create comparison charts — Plant vs. animal cell, mitosis vs. meiosis, aerobic vs. anaerobic respiration, monocot vs. dicot seed. Comparison questions are frequently asked in ICSE Biology.
3. Practise diagrams daily — Biology is a diagram-intensive subject. Practise drawing the digestive system, respiratory system, flower structure, and cell organelles with proper labels.
4. Make a disease chart — Create a table: disease name, causative organism, mode of transmission, symptoms, prevention. This covers chapters 16-18 efficiently.
5. Study nutrition tables — Know the source, function, and deficiency disease for every vitamin and mineral. Create a reference chart and revise it weekly.
6. Understand five kingdom classification — Know the key characteristics of each kingdom with 2-3 examples. Draw a classification flowchart for quick revision.
7. Don't skip environmental chapters — Waste Management and Pollution are short chapters but carry guaranteed marks. Revise them in the last week before exams.