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  • Crash Course: Biology: Animal Development

    Has profanity
    development biology
    animal development
    Hank explains the way in which organisms grow and develop. He covers how to determine the complexity of an organism and illustrates that the digestive tract is the first part of the organism that develops. Key Words: Animal Phyla, Layers of Tissue, Zygote, Cleaving, Blastula, Radial Symmetry, Bilateral Symmetry, Gastrulation, Gastrula, Deuterostome, Germ Layers, Ectoderm, Endoderm, Diploblastic, Triploblasts, Mesoderm

  • Crash Course: Biology: ATP

    adenosine triphosphate
    cellular respiration
    Hank explains how Adenosine Triphosphate (ATP) is used in the body. He describes ATP as the currency of biological energy.

  • Crash Course: Biology: Photosynthesis

    Hank explains in-depth the series of reactions that take place for a plant to produce food for itself, also known as photosynthesis. This video also explores the prerequisites (sunlight, carbon dioxide, and water) of these reactions. Key Words: Xylem, Stomata, Chlorophyll, Chloroplast, Thylakoid, Photoexcitation, Photosystem II, Electron Transport Chain, Cytochrome Complex, ATP 

  • Crash Course: Biology: Meiosis I: The Four Phases

    homologous recombination
    23rd chromosome
    phases of meiosis i
    Hank explains the four phases of meiosis 1: prophase 1, metaphase 1, anaphase 1, and telophase 1. He accompanies his explanations with visualizations that illustrate each phase.

  • Crash Course: Biology: Types of Selection

    types of selection
    Hank lists the different types of natural selection and explains each of them. He accompanies each type of selection with examples. He also briefly covers artificial selection, also known as selective breeding. Key Words: Phenotype, Genotype, Modes of Selection, Directional Selection, Stabilizing Selection, Disruptive Selection, Sexual Selection, Directional Sexual Selection, Artificial Selection