Biology Text Book 9th Class English Medium

Biology is the science of life. The word "Biology" comes from two Greek words i.e., "bios" (life) and "logos" (study). It explores the structures, functions, and interactions of living organisms. Understanding Biology helps us to address issues related to health, food, and the environment. Biology offers a fascinating journey of discovery from the microscopic world of bacteria to the vast ecosystems of our planet.

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Chapters

• Chapter 1- THE SCIENCE OF BIOLOGY
• Short description: Introduction to biology, its branches, scientific method, and applications.
• 1.1- Biology and its Branches
• 1.2- Relation of Biology with Other Sciences
• 1.3- Careers in Biology
• 1.4- Quranic Instructions to Reveal the Study of Life
• 1.5- Science as a Collaborative Field
• 1.6- Scientific Method
• 1.7- Theory and Law/Principle
• 1.8- Malaria -An Example of Biological Method
• Chapter 2- BIODIVERSITY
• Short description: Classification and diversity of living organisms, including taxonomic ranks and nomenclature.
• 2.1- Biodiversity
• 2.2- Classification
• 2.3- Taxonomic Ranks
• 2.4- History of Classification
• 2.5- Domains of Living Organisms
• 2.6- Classification of Domain Eukarya
• 2.7- Status of Virus in Classification
• 2.8- Binomial Nomenclature
• Chapter 3- THE CELL
• 3.1- Cell
• 3.2- Structure of Cell
• 3.3- Structural Advantages of Plant and Animal Cells
• 3.4- Cell Specialization
• 3.5- Stem Cells
• Chapter 4- CELL CYCLE
• 4.1- Cell Cycle
• 4.2- Mitosis
• 4.3- Meiosis
• 4.4- Comparison between Meiosis and Mitosis
• Chapter 5- TISSUES, ORGANS, AND ORGAN SYSTEMS
• 5.1- Levels of Organization
• 5.2- Organs and Organ Systems in Plants
• 5.3- Organs and Organ Systems in Humans
• 5.4- Homeostasis
• Chapter 6- BIOMOLECULES
• 6.1- Biomolecules
• 6.2- Carbohydrates
• 6.3- Proteins
• 6.4- Lipids
• 6.5- Nucleic Acids
• 6.6- The Working of DNA and RNA
• Chapter 7- ENZYMES
• 7.1- Metabolism
• 7.2- Enzymes
• 7.3- Mechanism of Enzyme Action
• 7.4- Factors that Affect the Activity of Enzymes
• 7.5- Enzyme Inhibition
• Chapter 8- BIOENERGETICS
• 8.1- ATP: The Cell's Energy Currency
• 8.2- Photosynthesis
• 8.3- Cellular Respiration
• Chapter 9- PLANT PHYSIOLOGY
• 9.1- Nutrition in Plants
• 9.2- Transport in Plants
• 9.3- Transpiration
• 9.4- Transport of Water and Salts in Plants
• 9.5- Translocation of Food in Plants
• 9.6- Gaseous Exchange in Plants
• 9.7- Mechanisms for Excretion in Plants
• 9.8- Osmotic Adjustments in Plants
• Chapter 10- REPRODUCTION IN PLANTS
• 10.1- Types of Asexual Reproduction
• 10.2- Artificial Propagation
• 10.3- Sexual Reproduction in Plants
• Chapter 11- BIOSTATISTICS
• 11.1- Introduction of Biostatistics
• 11.2- Mean, Median, and Mode
• 11.3- Bar Chart