Biology | Class 9

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    Chapter 1 The Science of Biology ( 22 videos)  (Practice Test)

      1.1: Introduction to Biology
      Introduction to Biology
    1. Introduction to Biology
      65455 views
      1.2: Major Fields of Biology (Practice Test)
      Branches of Biology: Botany, Zoology and Microbiology
    1. Branches of Biology: Botany, Zoology and Microbiology
      30244 views
      2. Branches of Biology: Morphology, Anatomy and Physiology
    2. Branches of Biology: Morphology, Anatomy and Physiology
      11586 views
      3. Branches of Biology: Cell Biology and Histology
    3. Branches of Biology: Cell Biology and Histology
      7585 views
      4. Branches of Biology: Genetics and Embryology
    4. Branches of Biology: Genetics and Embryology
      7526 views
      5. Branches of Biology: Environmental Biology, Taxonomy and Paleontology
    5. Branches of Biology: Environmental Biology, Taxonomy and Paleontology
      7251 views
      6. Branches of Biology: Sociobiology and Parasitology
    6. Branches of Biology: Sociobiology and Parasitology
      4154 views
      7. Branches of Biology: Biotechnology and Biochemistry
    7. Branches of Biology: Biotechnology and Biochemistry
      4004 views
      8. Branches of Biology: Immunology, Entomology and Pharmacology
    8. Branches of Biology: Immunology, Entomology and Pharmacology
      3194 views
      1.3: Relationship of Biology With Other Sciences
      Relationship of Biology with Other Sciences
    1. Relationship of Biology with Other Sciences
      8888 views
      2. Relationship of Biology With Other Science (Continued)
    2. Relationship of Biology With Other Science (Continued)
      5505 views
      1.4: Careers That Require A Background In Biology
      Branches of Biology: Biotechnology and Biochemistry
    1. Branches of Biology: Biotechnology and Biochemistry
      4004 views
      2. Animal Husbandry
    2. Animal Husbandry
      1.5: Science Is A Collaborative Field
      Relationship of Biology with Other Sciences
    1. Relationship of Biology with Other Sciences
      8888 views
      2. Relationship of Biology With Other Science (Continued)
    2. Relationship of Biology With Other Science (Continued)
      5505 views
      1.6: Biological Method (Practice Test)
      Biological Method / Scientific Method
    1. Biological Method / Scientific Method
      24526 views
      2. Biological Method / Scientific Method (Continued)
    2. Biological Method / Scientific Method (Continued)
      12596 views
      1.7: Hypothesis, Theory And Law
      Theory, Law and Principle in Biological Method
    1. Theory, Law and Principle in Biological Method
      6279 views
      2. Data Organization and Analysis
    2. Data Organization and Analysis
      5262 views
      1.8: Malaria An Example Of Biological Method of Study (Practice Test)
      Malaria: An Example of Biological Method of Study
    1. Malaria: An Example of Biological Method of Study
      7761 views
      2. Malaria An Example of Biological Method of Study (Continued)
    2. Malaria An Example of Biological Method of Study (Continued)
      4085 views
      3. Basic Information about Dengue Fever
    3. Basic Information about Dengue Fever
      598 views

    Chapter 2 Biodiversity ( 10 videos)  (Practice Test)

      2.1: Definition And Introduction To Biodiversity (Practice Test)
      Biodiversity and its Importance
    1. Biodiversity and its Importance
      14547 views
      2.2: Classification
      Aims and Basis of Classification
    1. Aims and Basis of Classification
      12075 views
      2.3: History of Classification (Practice Test)
      Two Kingdom Classification System
    1. Two Kingdom Classification System
      9650 views
      2. Three Kingdom Classification System
    2. Three Kingdom Classification System
      7821 views
      3. Five Kingdom System
    3. Five Kingdom System
      20175 views
      2.4: Classification- The Three Domains System
      Three Domains System
    1. Three Domains System
      2.5: Taxonomic Ranks of Classification (Practice Test)
      Taxonomic Hierarchy
    1. Taxonomic Hierarchy
      13440 views
      2.6: Species
      Species - The Basic Unit of Classification
    1. Species - The Basic Unit of Classification
      2.7: Binomial Nomenclature (Practice Test)
      Binomial Nomenclature Significance and Examples
    1. Binomial Nomenclature Significance and Examples
      6877 views
      2.8: Complications of Classifying Viruses (Practice Test)
      Status of Viruses
    1. Status of Viruses
      9055 views

    Chapter 3 The Cell ( 18 videos)  (Practice Test)

      3.1: Cell (Practice Test)
      Formulation of Cell Theory
    1. Formulation of Cell Theory
      15087 views
      2. Cell wall
    2. Cell wall
      36672 views
      3. Cell Membrane
    3. Cell Membrane
      24850 views
      4. Cytoplasm, Cytoskeleton
    4. Cytoplasm, Cytoskeleton
      17752 views
      5. Endoplasmic Reticulum (ER),Ribosomes
    5. Endoplasmic Reticulum (ER),Ribosomes
      14548 views
      6. Golgi Apparatus and Lysosomes
    6. Golgi Apparatus and Lysosomes
      22182 views
      7. Mitochondria
    7. Mitochondria
      15515 views
      8. Plastids
    8. Plastids
      13337 views
      9. Vacuoles
    9. Vacuoles
      11106 views
      10. Centrioles
    10. Centrioles
      17135 views
      11. Cilia and Flagella
    11. Cilia and Flagella
      10080 views
      12. Nucleus
    12. Nucleus
      17830 views
      13. Difference between Plant and Animal Cell
    13. Difference between Plant and Animal Cell
      2077 views
      3.2: Cell Specialization (Practice Test)
      Relationship b/w Cell Structure and Function
    1. Relationship b/w Cell Structure and Function
      2541 views
      2. Cell
    2. Cell
      6104 views
      3.3: Division of Labor (Practice Test)
      Cell
    1. Cell
      6104 views
      2. Cell
    2. Cell
      7353 views
      3.4: Stem Cells
      Stem cells: Embryonic And Adult Stem Cells
    1. Stem cells: Embryonic And Adult Stem Cells

    Chapter 4 Cell Cycle ( 13 videos)  (Practice Test)

      4.1: Cell Cycle (Practice Test)
      Cell Cycle
    1. Cell Cycle
      20785 views
      4.2: Spindle Apparatus (Practice Test)
      Centrioles
    1. Centrioles
      17135 views
      4.3: Mitosis (Practice Test)
      Mitosis, Prophase
    1. Mitosis, Prophase
      30609 views
      2. Anaphase, Telophase of Mitosis
    2. Anaphase, Telophase of Mitosis
      16891 views
      3. More on Mitosis, Cytokinesis
    3. More on Mitosis, Cytokinesis
      10975 views
      4. Significance of Mitosis
    4. Significance of Mitosis
      10862 views
      5. Tissue Culturing and Cloning
    5. Tissue Culturing and Cloning
      8030 views
      4.4: Meiosis (Practice Test)
      Meiosis
    1. Meiosis
      13659 views
      2. Metaphase I, Anaphase I and Telophase I
    2. Metaphase I, Anaphase I and Telophase I
      15853 views
      3. Meiosis I (Prophase I)
    3. Meiosis I (Prophase I)
      8802 views
      4. Meiosis-II
    4. Meiosis-II
      7798 views
      5. Significance of Meiosis
    5. Significance of Meiosis
      8647 views
      6. Comparison of Mitosis and Meiosis
    6. Comparison of Mitosis and Meiosis
      3684 views

    Chapter 5 Tissues, Organs And Organ Systems ( 11 videos)  (Practice Test)

      5.1: The Levels of Organization (Practice Test)
      Levels of Biological Organization: Subatomic, Atomic & Molecular Levels
    1. Levels of Biological Organization: Subatomic, Atomic & Molecular Levels
      12974 views
      2. Levels of Biological Organization: Organelle, Cell and Tissue Level
    2. Levels of Biological Organization: Organelle, Cell and Tissue Level
      9099 views
      3. Levels of Biological Organization: Organ and Organ System Levels
    3. Levels of Biological Organization: Organ and Organ System Levels
      8716 views
      5.2: Homeostasis (Practice Test)
      Homeostasis
    1. Homeostasis
      2717 views
      2. Osmoregulation, Thermoregulation and Excretion
    2. Osmoregulation, Thermoregulation and Excretion
      29601 views
      3. Organs Involved in Homeostasis (Skin and Lungs)
    3. Organs Involved in Homeostasis (Skin and Lungs)
      5287 views
      4. Regulatory Strategies
    4. Regulatory Strategies
      3674 views
      5. Role of Human Organs Systems In Homeostasis (Part i)
    5. Role of Human Organs Systems In Homeostasis (Part i)
      6. Role of Human Organs Systems In Homeostasis (Part ii)
    6. Role of Human Organs Systems In Homeostasis (Part ii)
      5.3: Plant Tissues (Practice Test)
      Animal and Plant Tissues
    1. Animal and Plant Tissues
      4313 views
      2. Internal Structure of Leaf
    2. Internal Structure of Leaf
      2993 views

    Chapter 6 Molecular Biology ( 22 videos)  (Practice Test)

      6.1: Biochemistry/Molecular Biology
      Branches of Biology: Biotechnology and Biochemistry
    1. Branches of Biology: Biotechnology and Biochemistry
      4004 views
      2. Chemical composition of protoplasm
    2. Chemical composition of protoplasm
      1594 views
      6.2: Biological Molecules (Practice Test)
      Fundamental Biological Molecules
    1. Fundamental Biological Molecules
      6.3: Proteins (Practice Test)
      Proteins
    1. Proteins
      4718 views
      2. Structure of Protein
    2. Structure of Protein
      9505 views
      3. Function of Protein
    3. Function of Protein
      2736 views
      4. Structure of Amino Acid
    4. Structure of Amino Acid
      7394 views
      6.4: Lipids
      Fatty Acids to Lipids
    1. Fatty Acids to Lipids
      951 views
      2. Characteristics of Lipids
    2. Characteristics of Lipids
      7655 views
      6.5: Carbohydrates
      Carbohydrates
    1. Carbohydrates
      12933 views
      2. Carbohydrates
    2. Carbohydrates
      3936 views
      6.6: Classification of Carbohydrates (Practice Test)
      Classification of Carbohydrates
    1. Classification of Carbohydrates
      284 views
      2. Structure and Functions of Monosaccharides (Simplest Carbohydrates)
    2. Structure and Functions of Monosaccharides (Simplest Carbohydrates)
      15236 views
      3. Disaccharides
    3. Disaccharides
      300 views
      4. Functions of Polysaccharides (Complex Carbohydrates) In Living Organisms
    4. Functions of Polysaccharides (Complex Carbohydrates) In Living Organisms
      5810 views
      6.7: Nucleic Acids (Practice Test)
      Structure and Role of Nucleic Acids
    1. Structure and Role of Nucleic Acids
      7070 views
      2. Advance (Watson and Crick's Model)
    2. Advance (Watson and Crick's Model)
      65841 views
      6.8: Function of DNA (Genes) As Carrier of Hereditary Information
      Gene, Chromosome, Chromatin
    1. Gene, Chromosome, Chromatin
      11553 views
      2. Chromosomes as a Carriers of Genes
    2. Chromosomes as a Carriers of Genes
      4638 views
      6.9: Structure of Ribonucleic Acid (RNA)
      Structure and Role of Nucleic Acids
    1. Structure and Role of Nucleic Acids
      7070 views
      6.10: Function of RNA In Converting Hereditary Information Into Useful Proteins (Practice Test)
      Types of RNA
    1. Types of RNA
      13828 views
      6.11: Flow of Genetic Information From DNA To RNA And Then To Proteins (Practice Test)
      RNA As A Carrier of Genetic Information
    1. RNA As A Carrier of Genetic Information
      2529 views

    Chapter 7 Metabolism ( 15 videos)  (Practice Test)

      7.1: Metabolism And Its Types
      Metabolism
    1. Metabolism
      7.2: Enzymes And Their Characteristics (Practice Test)
      Enzymes
    1. Enzymes
      21151 views
      2. Intracellular and Extracellular Enzymes and Enzymes Increase Rate of Reaction
    2. Intracellular and Extracellular Enzymes and Enzymes Increase Rate of Reaction
      3. Characteristics of Enzymes
    3. Characteristics of Enzymes
      8195 views
      4. Types of Cofactors
    4. Types of Cofactors
      1530 views
      7.3: Mechanism of Enzyme Action
      Mechanism of Enzyme Action: Formation of Enzyme-substrate Complex
    1. Mechanism of Enzyme Action: Formation of Enzyme-substrate Complex
      7.4: Factors Affecting Enzyme Activity
      Factors Effecting the Rate of Enzyme Action
    1. Factors Effecting the Rate of Enzyme Action
      7365 views
      7.5: Enzyme Inhibition
      Inhibitors
    1. Inhibitors
      9586 views
      7.6: Role of ATP-The Energy Currency of Cell
      Role of ATP as Energy Currency
    1. Role of ATP as Energy Currency
      11149 views
      7.7: Photosynthesis (Practice Test)
      Mechanism of Photosynthesis
    1. Mechanism of Photosynthesis
      3167 views
      2. More on Light Reaction
    2. More on Light Reaction
      5894 views
      3. More on Dark Reaction
    3. More on Dark Reaction
      4428 views
      4. Limiting Factors in Photosynthesis
    4. Limiting Factors in Photosynthesis
      3961 views
      7.8: Respiration (Practice Test)
      Aerobic and Anaerobic Respiration
    1. Aerobic and Anaerobic Respiration
      8937 views
      2. Mechanism of Aerobic Respiration (Glycolysis, Krebs Cycle And ETC)
    2. Mechanism of Aerobic Respiration (Glycolysis, Krebs Cycle And ETC)

    Chapter 8 Plant Physiology ( 17 videos)  (Practice Test)

      8.1: Nutrition In Plants (Practice Test)
      Micronutrients and Macronutrients
    1. Micronutrients and Macronutrients
      7599 views
      2. Role of Nitrogen and Magnesium
    2. Role of Nitrogen and Magnesium
      5172 views
      8.2: Transport In Plants (Practice Test)
      Transport of Water
    1. Transport of Water
      2. Water and Ion Uptake
    2. Water and Ion Uptake
      7902 views
      3. More on Diffusion, Active Transport, Facilitated Diffusion
    3. More on Diffusion, Active Transport, Facilitated Diffusion
      348 views
      4. Transpiration
    4. Transpiration
      4807 views
      5. Transpiration
    5. Transpiration
      97 views
      6. Water Movement in Xylem Through TACT Mechanism
    6. Water Movement in Xylem Through TACT Mechanism
      7. Translocation
    7. Translocation
      109 views
      8. Pattern or Direction of Translocation
    8. Pattern or Direction of Translocation
      9. Pressure Flow Hypothesis
    9. Pressure Flow Hypothesis
      1630 views
      8.3: Gas Exchange In Plants (Practice Test)
      Gaseous Exchange in Plants
    1. Gaseous Exchange in Plants
      16125 views
      8.4: Homeostasis In Plants (Practice Test)
      Excretion in Plants
    1. Excretion in Plants
      15550 views
      2. Removal of Extra Carbon dioxide and Oxygen, Extra Water
    2. Removal of Extra Carbon dioxide and Oxygen, Extra Water
      5472 views
      3. Removal of Other Metabolic Wastes
    3. Removal of Other Metabolic Wastes
      3654 views
      4. Water Balance Problems
    4. Water Balance Problems
      4147 views
      5. Osmotic Adjustments in Plants
    5. Osmotic Adjustments in Plants
      13172 views

    Chapter 9 Plant Reproduction ( 21 videos)  (Practice Test)

      9.1: Asexual Reproduction (Practice Test)
      Reproduction, Asexual and Sexual reproduction
    1. Reproduction, Asexual and Sexual reproduction
      11247 views
      2. Binary Fission
    2. Binary Fission
      9458 views
      3. Multiple Fission
    3. Multiple Fission
      9982 views
      4. Fragmentation, Budding
    4. Fragmentation, Budding
      6912 views
      5. Spore Formation
    5. Spore Formation
      13066 views
      6. Parthenogenesis, Vegetative Propagation
    6. Parthenogenesis, Vegetative Propagation
      4147 views
      7. Natural Vegetative Propagation
    7. Natural Vegetative Propagation
      8829 views
      8. More on Natural Vegetative Propagation
    8. More on Natural Vegetative Propagation
      2352 views
      9. Artificial Vegetative Propagation, Cutting, Grafting and Cloning
    9. Artificial Vegetative Propagation, Cutting, Grafting and Cloning
      4255 views
      10. Advantages and Disadvantages of Vegetative Propagation of Plants
    10. Advantages and Disadvantages of Vegetative Propagation of Plants
      8897 views
      11. Tissue Culturing and Cloning
    11. Tissue Culturing and Cloning
      8030 views
      9.2: Sexual Reproduction (Practice Test)
      Alternation of Generations
    1. Alternation of Generations
      6097 views
      2. Sexual Reproduction in Flowering Plants
    2. Sexual Reproduction in Flowering Plants
      9737 views
      3. More Sexual Reproduction in Flowering Plants
    3. More Sexual Reproduction in Flowering Plants
      5351 views
      4. Adaptations in Insect-Pollinated and wind-Pollinated Flowers
    4. Adaptations in Insect-Pollinated and wind-Pollinated Flowers
      4594 views
      5. Life Cycle of an Angiospermic plant
    5. Life Cycle of an Angiospermic plant
      3006 views
      6. Formation of Seed and fruit
    6. Formation of Seed and fruit
      2487 views
      7. Development and Structure of Seed
    7. Development and Structure of Seed
      17044 views
      8. Structure of Mature Seed
    8. Structure of Mature Seed
      2747 views
      9. Germination of Seed
    9. Germination of Seed
      6453 views
      10. Conditions Necessary for Seed Germination
    10. Conditions Necessary for Seed Germination
      4612 views

    Chapter 10 Evolution ( 12 videos)  (Practice Test)

      10.1: Variation And Evolution (Practice Test)
      What is Variation?
    1. What is Variation?
      923 views
      2. Causes of Variations
    2. Causes of Variations
      3. More on Causes of Variation
    3. More on Causes of Variation
      4. Concept of Evolution VS Special Creation
    4. Concept of Evolution VS Special Creation
      7210 views
      5. Variations lead to Evolution
    5. Variations lead to Evolution
      5196 views
      6. Theory of Natural Selection
    6. Theory of Natural Selection
      11343 views
      7. More on Theory of Natural Selection
    7. More on Theory of Natural Selection
      2449 views
      10.2: Evidences of Evolution (Practice Test)
      Evidence From Biogeography and Paleontology
    1. Evidence From Biogeography and Paleontology
      2. Biogeography, The Fossil Record and Comparative Anatomy
    2. Biogeography, The Fossil Record and Comparative Anatomy
      5051 views
      3. Artificial Selection
    3. Artificial Selection
      9753 views
      4. Differences B/W Natural and Artificial Selection
    4. Differences B/W Natural and Artificial Selection
      1245 views
      10.3: Speciation
      Allopatric Speciation
    1. Allopatric Speciation
      1564 views