Biology | Class 9

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    Chapter 1 The Science of Biology (25 videos) (Practice Test) (Exercises Exercise Answers)

      1.1: Introduction to Biology (Practice Test)
      Introduction to Biology
    1. Introduction to Biology
      65455 views
      2. Branches of Biology: Botany, Zoology and Microbiology
    2. Branches of Biology: Botany, Zoology and Microbiology
      30244 views
      3. Branches of Biology: Morphology, Anatomy and Physiology
    3. Branches of Biology: Morphology, Anatomy and Physiology
      11586 views
      4. Branches of Biology: Cell Biology and Histology
    4. Branches of Biology: Cell Biology and Histology
      7585 views
      5. Comparative Biochemistry, Cytology, Genetics
    5. Comparative Biochemistry, Cytology, Genetics
      6. Branches of Biology: Human Biology and Molecular Biology
    6. Branches of Biology: Human Biology and Molecular Biology
      7. Branches of Biology: Genetics and Embryology
    7. Branches of Biology: Genetics and Embryology
      7526 views
      8. Branches of Biology: Environmental Biology, Taxonomy and Paleontology
    8. Branches of Biology: Environmental Biology, Taxonomy and Paleontology
      7251 views
      9. Ecology
    9. Ecology
      2941 views
      10. Branches of Biology: Marine Biology And Fresh Water Biology
    10. Branches of Biology: Marine Biology And Fresh Water Biology
      11. Branches of Biology: Immunology, Entomology and Pharmacology
    11. Branches of Biology: Immunology, Entomology and Pharmacology
      3194 views
      1.2: Relationship of Biology With Other Sciences (Practice Test)
      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
      3. Branches of Biology: Biotechnology and Biochemistry
    3. Branches of Biology: Biotechnology and Biochemistry
      4004 views
      1.3: Careers in Biology (Practice Test)
      Agriculture, Forestry
    1. Agriculture, Forestry
      157 views
      2. Animal Husbandry
    2. Animal Husbandry
      3. Branches of Biology: Biotechnology and Biochemistry
    3. Branches of Biology: Biotechnology and Biochemistry
      4004 views
      1.4: Quranic Instructions to Reveal the Study of Life (Practice Test)
      Teaching of Islam and Science
    1. Teaching of Islam and Science
      6890 views
      1.5: Science as a Collaborative Field (Practice Test)
      The Human Genome Project
    1. The Human Genome Project
      5217 views
      2. Relationship of Biology with Other Sciences
    2. Relationship of Biology with Other Sciences
      8888 views
      1.6: Scientific 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: Theory and Law (Principle) (Practice Test)
      Theory, Law and Principle in Biological Method
    1. Theory, Law and Principle in Biological Method
      6279 views
      1.8: Malaria- An Example of Biological Method (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

    Chapter 2 Biodiversity (13 videos) (Practice Test) (Exercises Exercise Answers)

      2.1: Biodiversity (Practice Test)
      Biodiversity and its Importance
    1. Biodiversity and its Importance
      14547 views
      2.2: Classification (Practice Test)
      Aims and Basis of Classification
    1. Aims and Basis of Classification
      12075 views
      2.3: Taxonomic Ranks (Practice Test)
      Taxonomic Hierarchy
    1. Taxonomic Hierarchy
      13440 views
      2. Species - The Basic Unit of Classification
    2. Species - The Basic Unit of Classification
      2.4: History of Classification Systems (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. Basis of Five Kingdom Classification System
    3. Basis of Five Kingdom Classification System
      4. Three Domains System
    4. Three Domains System
      2.5: Domains of Living Organisms
      Three Domains System
    1. Three Domains System
      2.6: Classification of Domain Eukarya (Practice Test)
      Five Kingdom System
    1. Five Kingdom System
      20175 views
      2. More on Five Kingdom Classification System
    2. More on Five Kingdom Classification System
      1829 views
      2.7: Status of Virus in Classification (Practice Test)
      Status of Viruses
    1. Status of Viruses
      9055 views
      2.8: Binomial Nomenclature (Practice Test)
      Binomial Nomenclature Significance and Examples
    1. Binomial Nomenclature Significance and Examples
      6877 views

    Chapter 3 The Cell (23 videos) (Practice Test) (Exercises Exercise Answers)

      3.1: The Cell (Practice Test)
      Cell
    1. Cell
      7353 views
      3.2: Structure of Cell (Practice Test)
      Cell wall
    1. Cell wall
      36672 views
      2. Animal and Plant Cells Common Features
    2. Animal and Plant Cells Common Features
      3089 views
      3. Layers of Plant Cell Wall
    3. Layers of Plant Cell Wall
      4. Cell Membrane
    4. Cell Membrane
      24850 views
      5. Cytoplasm, Cytoskeleton
    5. Cytoplasm, Cytoskeleton
      17752 views
      6. Nucleus
    6. Nucleus
      17830 views
      7. Endoplasmic Reticulum (ER),Ribosomes
    7. Endoplasmic Reticulum (ER),Ribosomes
      14548 views
      8. Endoplasmic Reticulum (ER), Ribosomes
    8. Endoplasmic Reticulum (ER), Ribosomes
      9. Golgi Apparatus and Lysosomes
    9. Golgi Apparatus and Lysosomes
      22182 views
      10. Golgi Apparatus and Lysosomes
    10. Golgi Apparatus and Lysosomes
      11. Mitochondria
    11. Mitochondria
      15515 views
      12. Plastids
    12. Plastids
      13337 views
      13. Vacuoles
    13. Vacuoles
      11106 views
      14. Vacuoles
    14. Vacuoles
      15. Centrioles
    15. Centrioles
      16. Cilia and Flagella
    16. Cilia and Flagella
      17. Difference between Plant and Animal Cell
    17. Difference between Plant and Animal Cell
      2077 views
      3.3: Structural Advantages of Plant and Animal Cells (Practice Test)
      Difference between Plant and Animal Cell
    1. Difference between Plant and Animal Cell
      2077 views
      3.4: Cell Specialization (Practice Test)
      Cell
    1. Cell
      6104 views
      2. Cell
    2. Cell
      7353 views
      3. Specialized Cells, Animal and Plant Cells
    3. Specialized Cells, Animal and Plant Cells
      532 views
      3.5: Stem Cells
      Stem cells: Embryonic And Adult Stem Cells
    1. Stem cells: Embryonic And Adult Stem Cells

    Chapter 4 Cell Cycle (14 videos) (Practice Test) (Exercises Exercise Answers)

      4.1: Cell Cycle (Practice Test)
      Cell Cycle
    1. Cell Cycle
      20785 views
      4.2: Mitosis (Practice Test)
      Mitosis, Prophase
    1. Mitosis, Prophase
      30609 views
      2. Metaphase
    2. Metaphase
      3. More on Mitosis, Cytokinesis
    3. More on Mitosis, Cytokinesis
      10975 views
      4. Significance of Mitosis
    4. Significance of Mitosis
      10862 views
      5. Cancer (Uncontrolled Cell Division)
    5. Cancer (Uncontrolled Cell Division)
      3827 views
      6. Bengin or Malignant
    6. Bengin or Malignant
      1102 views
      4.3: Meiosis (Practice Test)
      Meiosis
    1. Meiosis
      13659 views
      2. Meiosis I (Prophase I)
    2. Meiosis I (Prophase I)
      8802 views
      3. Metaphase I, Anaphase I and Telophase I
    3. Metaphase I, Anaphase I and Telophase I
      15853 views
      4. Meiosis-II
    4. Meiosis-II
      7798 views
      5. Significance of Meiosis
    5. Significance of Meiosis
      8647 views
      6. Non Disjunction, Heteropliody and Polyploidy
    6. Non Disjunction, Heteropliody and Polyploidy
      1521 views
      4.4: Comparison Between Meiosis and Mitosis (Practice Test)
      Comparison of Mitosis and Meiosis
    1. Comparison of Mitosis and Meiosis
      3684 views

    Chapter 5 Tissues, Organs, and Organ Systems (16 videos) (Practice Test) (Exercises Exercise Answers)

      5.1: Levels of Organization (Practice Test)
      Levels of Biological Organization
    1. Levels of Biological Organization
      9643 views
      2. Levels of Organization (Continued)
    2. Levels of Organization (Continued)
      3. Levels of Biological Organization: Subatomic, Atomic & Molecular Levels
    3. Levels of Biological Organization: Subatomic, Atomic & Molecular Levels
      12974 views
      4. Levels of Biological Organization: Organelle, Cell and Tissue Level
    4. Levels of Biological Organization: Organelle, Cell and Tissue Level
      9099 views
      5. Levels of Biological Organization: Organ and Organ System Levels
    5. Levels of Biological Organization: Organ and Organ System Levels
      8716 views
      6. Levels of Biological Organization: Individual, Population, Community, Biosphere
    6. Levels of Biological Organization: Individual, Population, Community, Biosphere
      6670 views
      5.2: Organs and Organ Systems in Plants (Practice Test)
      Structure of Mustard Plant (Brassica)
    1. Structure of Mustard Plant (Brassica)
      4595 views
      2. Leaf, Internal Structure of Leaf
    2. Leaf, Internal Structure of Leaf
      1777 views
      3. Internal Structure of Leaf
    3. Internal Structure of Leaf
      2993 views
      4. Systems of A Plant
    4. Systems of A Plant
      864 views
      5.3: Organs and Organ Systems in Humans (Practice Test)
      Major Human Organs
    1. Major Human Organs
      64 views
      2. Stomach Digestion
    2. Stomach Digestion
      11097 views
      3. Levels of Biological Organization: Organ and Organ System Levels
    3. Levels of Biological Organization: Organ and Organ System Levels
      8716 views
      5.4: Homeostasis (Practice Test)
      Homeostasis
    1. Homeostasis
      2717 views
      2. Role of Human Organs Systems In Homeostasis (Part i)
    2. Role of Human Organs Systems In Homeostasis (Part i)
      3. Role of Human Organs Systems In Homeostasis (Part ii)
    3. Role of Human Organs Systems In Homeostasis (Part ii)

    Chapter 6 Biomolecules (19 videos) (Practice Test) (Exercises Exercise Answers)

      6.1: Biomolecules (Practice Test)
      Fundamental Biological Molecules
    1. Fundamental Biological Molecules
      6.2: Carbohydrates (Practice Test)
      Carbohydrates
    1. Carbohydrates
      12933 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
      5. Functions of Carbohydrates
    5. Functions of Carbohydrates
      8359 views
      6.3: Proteins (Practice Test)
      Structure of Protein
    1. Structure of Protein
      9505 views
      2. Structure of Amino Acid
    2. Structure of Amino Acid
      7394 views
      3. Function of Protein
    3. Function of Protein
      2736 views
      6.4: Lipids (Practice Test)
      Fatty Acids to Lipids
    1. Fatty Acids to Lipids
      951 views
      2. Fatty Acids and Glycerol to Lipids
    2. Fatty Acids and Glycerol to Lipids
      2055 views
      3. Saturated and Unsaturated Fats
    3. Saturated and Unsaturated Fats
      5096 views
      4. Phospholipids (A Class of Lipids)
    4. Phospholipids (A Class of Lipids)
      8104 views
      5. Characteristics of Lipids
    5. Characteristics of Lipids
      7655 views
      6.5: 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
      3. Types of RNA
    3. Types of RNA
      13828 views
      6.6: The Working of DNA and RNA (Practice Test)
      Transcription
    1. Transcription
      18325 views
      2. Translation
    2. Translation
      15338 views

    Chapter 7 Enzymes (11 videos) (Practice Test) (Exercises Exercise Answers)

      7.1: Metabolism
      Metabolism
    1. Metabolism
      7.2: Enzymes (Practice Test)
      Enzymes
    1. Enzymes
      21151 views
      2. Characteristics of Enzymes
    2. Characteristics of Enzymes
      8195 views
      3. Specificity of Enzymes
    3. Specificity of Enzymes
      6045 views
      4. Intracellular and Extracellular Enzymes and Enzymes Increase Rate of Reaction
    4. Intracellular and Extracellular Enzymes and Enzymes Increase Rate of Reaction
      5. Three Groups of Enzymes
    5. Three Groups of Enzymes
      7655 views
      6. Uses of Enzymes
    6. Uses of Enzymes
      4621 views
      7.3: Mechanism of Enzyme Action (Practice Test)
      Lock and Key Model
    1. Lock and Key Model
      9839 views
      2. Induced Fit Model
    2. Induced Fit Model
      2579 views
      7.4: Factors That Affect the Activity of Enzymes (Practice Test)
      Factors Effecting the Rate of Enzyme Action
    1. Factors Effecting the Rate of Enzyme Action
      7365 views
      7.5: Enzyme Inhibition (Practice Test)
      Inhibitors
    1. Inhibitors
      9586 views

    Chapter 8 Bioenergetics (20 videos) (Practice Test) (Exercises Exercise Answers)

      8.1: ATP:The Cell's Energy Currency (Practice Test)
      Basic Introduction
    1. Basic Introduction
      10345 views
      2. Oxidation-Reduction Reaction
    2. Oxidation-Reduction Reaction
      8855 views
      3. Role of ATP as Energy Currency
    3. Role of ATP as Energy Currency
      11149 views
      8.2: Photosynthesis (Practice Test)
      Photosynthesis
    1. Photosynthesis
      3647 views
      2. Mechanism of Photosynthesis
    2. Mechanism of Photosynthesis
      3167 views
      3. More on Light Reaction
    3. More on Light Reaction
      5894 views
      4. Cyclic Phosphorylation
    4. Cyclic Phosphorylation
      15873 views
      5. Noncyclic Phosphorylation
    5. Noncyclic Phosphorylation
      24623 views
      6. More on Dark Reaction
    6. More on Dark Reaction
      4428 views
      7. Role of Chlorophyll and Light
    7. Role of Chlorophyll and Light
      8955 views
      8.3: Cellular Respiration (Practice Test)
      Aerobic and Anaerobic Respiration
    1. Aerobic and Anaerobic Respiration
      8937 views
      2. Alcoholic Fermentation (by Yeast),
    2. Alcoholic Fermentation (by Yeast),
      4633 views
      3. Lactic Acid Fermentation (by Bacteria)
    3. Lactic Acid Fermentation (by Bacteria)
      3353 views
      4. Fermentation Product
    4. Fermentation Product
      2735 views
      5. Mechanism of Respiration, Glycolysis
    5. Mechanism of Respiration, Glycolysis
      8440 views
      6. Glycolysis
    6. Glycolysis
      5679 views
      7. Krebs Cycle
    7. Krebs Cycle
      6354 views
      8. Components of Electron Transport Chain
    8. Components of Electron Transport Chain
      9. Comparison of Aerobic and Anaerobic Respiration
    9. Comparison of Aerobic and Anaerobic Respiration
      1915 views
      10. Comparison of Photosynthesis and Respiration
    10. Comparison of Photosynthesis and Respiration
      3194 views

    Chapter 9 Plant Physiology (29 videos) (Practice Test) (Exercises Exercise Answers)

      9.1: Nutrition In Plants (Practice Test)
      Basic definitions
    1. Basic definitions
      3889 views
      2. Autotrophic and Heterotrophic Organisms
    2. Autotrophic and Heterotrophic Organisms
      3473 views
      3. Micronutrients and Macronutrients
    3. Micronutrients and Macronutrients
      7599 views
      4. Minerals Requirement, Phosphorus
    4. Minerals Requirement, Phosphorus
      949 views
      5. Minerals Requirement, Potassium
    5. Minerals Requirement, Potassium
      812 views
      6. Role of Nitrogen and Magnesium
    6. Role of Nitrogen and Magnesium
      5172 views
      9.2: Transport In Plants (Practice Test)
      Transport in Plants
    1. Transport in Plants
      5823 views
      2. Passive Transport and Active Transport
    2. Passive Transport and Active Transport
      6121 views
      3. Osmosis
    3. Osmosis
      6053 views
      4. Structure of Root
    4. Structure of Root
      2340 views
      5. Water and Ion Uptake
    5. Water and Ion Uptake
      7902 views
      9.3: Transpiration (Practice Test)
      Transpiration
    1. Transpiration
      4807 views
      2. Opening and Closing of Stomata
    2. Opening and Closing of Stomata
      12113 views
      3. Transpiration a Necessary Evil
    3. Transpiration a Necessary Evil
      1582 views
      4. Factors Affecting the Rate of Transpiration
    4. Factors Affecting the Rate of Transpiration
      5640 views
      9.4: Transport of Water in Plants (Practice Test)
      Transport of Water
    1. Transport of Water
      4618 views
      9.5: Translocation of Food In Plants (Practice Test)
      Transport of Food
    1. Transport of Food
      8089 views
      2. Pressure Flow Hypothesis
    2. Pressure Flow Hypothesis
      1630 views
      9.6: Gaseous Exchange In Plants (Practice Test)
      Gaseous Exchange in Plants
    1. Gaseous Exchange in Plants
      16125 views
      2. Gaseous Exchange in Plants
    2. Gaseous Exchange in Plants
      3586 views
      9.7: Mechanism for Excretion In Plants (Practice Test)
      Excretion in Plants
    1. Excretion in Plants
      15550 views
      2. Transpiration
    2. Transpiration
      4807 views
      3. Guttation
    3. Guttation
      4. Latex, Resins and Gums
    4. Latex, Resins and Gums
      5. Removal of Other Metabolic Wastes
    5. Removal of Other Metabolic Wastes
      9.8: Osmotic Adjustments In Plants (Practice Test)
      Osmotic Adjustments in Plants
    1. Osmotic Adjustments in Plants
      13172 views
      2. Hydrophytes and Halophytes
    2. Hydrophytes and Halophytes
      13556 views
      3. Xerophytes and Mesophytes
    3. Xerophytes and Mesophytes
      9728 views
      4. Mesophytes
    4. Mesophytes
      924 views

    Chapter 10 Reproduction in Plants (12 videos) (Practice Test) (Exercises Exercise Answers)

      10.1: Types of 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. Fragmentation, Budding
    3. Fragmentation, Budding
      6912 views
      4. Spore Formation
    4. Spore Formation
      13066 views
      5. Natural Vegetative Propagation
    5. Natural Vegetative Propagation
      8829 views
      6. More on Natural Vegetative Propagation
    6. More on Natural Vegetative Propagation
      2352 views
      10.2: Artificial Propagation (Practice Test)
      Artificial Vegetative Propagation, Cutting, Grafting and Cloning
    1. Artificial Vegetative Propagation, Cutting, Grafting and Cloning
      4255 views
      2. Advantages and Disadvantages of Vegetative Propagation of Plants
    2. Advantages and Disadvantages of Vegetative Propagation of Plants
      8897 views
      10.3: Sexual Reproduction in Plants (Practice Test)
      Alternation of Generations
    1. Alternation of Generations
      6097 views
      2. Sexual Reproduction in Flowering Plants, The Flower
    2. Sexual Reproduction in Flowering Plants, The Flower
      1046 views
      3. Life Cycle of an Angiospermic plant
    3. Life Cycle of an Angiospermic plant
      3006 views
      4. Self and Cross Pollination
    4. Self and Cross Pollination

    Chapter 11 Biostatistics (6 videos) (Practice Test) (Exercises Exercise Answers)

      11.1: Introduction of Biostatistics
      Biostatistics and its Uses
    1. Biostatistics and its Uses
      11.2: Mean, Median and Mode (Practice Test)
      Arithmetic Mean of Raw Data-Direct Method
    1. Arithmetic Mean of Raw Data-Direct Method
      4101 views
      2. Mode for Ungrouped Data
    2. Mode for Ungrouped Data
      1778 views
      3. Median of Primary Data
    3. Median of Primary Data
      166 views
      11.3: Bar Chart (Practice Test)
      Introduction to Graph
    1. Introduction to Graph
      288 views
      2. Reading bar graph
    2. Reading bar graph
      116 views