The CBSE Class 9 Biology syllabus covers the fundamental concepts of life, including cell structure, tissues, reproduction, and biological diversity. Biology is taught as part of the integrated science subject in Class 9. The syllabus helps students understand living organisms, their structural organization, life processes, and relationships with the environment.
Note: The 27 marks are allocated to the complete World of Living unit, not to biology as a separate subject.
Chapter 1: Cell—The Fundamental Unit of Life
This chapter introduces the cell as the structural and functional unit of living organisms. Students learn about cell discovery, cell structure, organelles, and the processes that take place inside cells.
Topics Covered
- Discovery of the Cell
- Plant Cell and Animal Cell
- Prokaryotic and Eukaryotic Cells
- Cell as the Structural and Functional Unit of Life
- Cell Organelles and Their Functions
- Nucleus, Mitochondria, Chloroplasts, Endoplasmic Reticulum, and Vacuoles
- Plasma Membrane and Cell Wall
- Permeability of the Cell Membrane
- Diffusion and Osmosis
- Cell Division: Mitosis and Meiosis
- Cellular Division and Cancer
- Recent Advancements in Cell Biology
Chapter 2: Tissues
This chapter explains how cells organise into tissues to perform specialised functions in plants and animals. Students explore different types of plant and animal tissues and their roles in living organisms.
Topics Covered
- Introduction to Tissues and Their Importance
- Levels of Organisation in Living Organisms
- Plant and Animal Tissues
- Meristematic Tissues and Their Types
- Permanent Tissues
- Simple and Complex Permanent Tissues
- Parenchyma, Collenchyma, and Sclerenchyma
- Xylem and Phloem
- Epithelial, Connective, Muscular, and Nervous Tissues
- Types of Muscles: Striated, Smooth, and Cardiac
- Musculoskeletal System
- Types of Joints
- Care of the Musculoskeletal System, Including Injuries, Posture, Nutrition, and Exercise
Chapter 3: Reproduction
This chapter introduces reproduction in living organisms and explains how organisms produce offspring. It covers asexual and sexual reproduction, reproduction in flowering plants and humans, and reproductive health.
Topics Covered
- Introduction to Reproduction
- Asexual and Sexual Reproduction
- Types of Asexual Reproduction with Examples
- Sexual Reproduction in Flowering Plants
- Structure and Parts of a Flower
- Pollination and Fertilisation
- Seed Dispersal
- Male and Female Reproductive Systems in Humans
- Formation of Gametes: Sperm and Egg
- Fertilisation, Pregnancy, and Embryonic Development
- Menstrual Cycle
- Reproductive Health and Hygiene
- Introduction to Birth Control Methods and Their Importance
- Variations Introduced Through Sexual Reproduction
Chapter 4: Diversity
This chapter introduces the classification of living organisms based on their characteristics, cellular organisation, and mode of nutrition. Students learn about biological classification and the diversity of plants, animals, and other organisms.
Topics Covered
- Importance of Classification
- Five-Kingdom Classification
- Key Features of the Five Kingdoms with Examples
- Major Divisions of Animals and Plants
- Binomial Nomenclature
- Acellular Entities: Viruses
- Classification Based on Cellular Organisation
- Classification Based on Mode of Nutrition
- Ecological Roles of Different Organisms
- Interactions Between Organisms, Including Lichens
- Introduction to the Three Domains of Classification Based on Molecular Evidence
Note: This article follows the Biology-related content in the CBSE Class 9 Science curriculum for 2026–27. The chapter names and topics reflect the revised curriculum, and the marks for the World of Living unit are not a separate Biology marks allocation.
