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The Best Episodes of Crash Course Biology

Every episode of Crash Course Biology ranked from best to worst. Let's dive into the Best Episodes of Crash Course Biology!

The Best Episodes of Crash Course Biology

And thus begins the most revolutionary biology course in history. Come and learn about covalent, ionic, and hydrogen bonds. What about electron orbitals, the octet...

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  1. Background image for That's Why Carbon Is A Tramp
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    #1 - That's Why Carbon Is A Tramp

    S1:E1

    And thus begins the most revolutionary biology course in history. Come and learn about covalent, ionic, and hydrogen bonds. What about electron orbitals, the octet rule, and what does it all have to do with a mad man named Gilbert Lewis? It's all contained within.

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    Director:Unknown
    Writer:Unknown
  2. Background image for Water - Liquid Awesome
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    #2 - Water - Liquid Awesome

    S1:E2

    Hank teaches us why water is one of the most fascinating and important substances in the universe.

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    Director:Unknown
    Writer:Unknown
  3. Background image for Biological Molecules - You Are What You Eat
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    #3 - Biological Molecules - You Are What You Eat

    S1:E3

    Hank talks about the molecules that make up every living thing - carbohydrates, lipids, and proteins - and how we find them in our environment and in the food that we eat.

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    Director:Unknown
    Writer:Unknown
  4. Background image for Eukaryopolis - The City of Animal Cells
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    #4 - Eukaryopolis - The City of Animal Cells

    S1:E4

    Hank tells us about the city of Eukaryopolis - the animal cell that is responsible for all the cool things that happen in our bodies.

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    Director:Unknown
    Writer:Unknown
  5. Background image for In Da Club - Membranes & Transport
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    #5 - In Da Club - Membranes & Transport

    S1:E5

    Hank describes how cells regulate their contents and communicate with one another via mechanisms within the cell membrane.

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    Director:Unknown
    Writer:Unknown
  6. Background image for Plant Cells
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    #6 - Plant Cells

    S1:E6

    Hank describes why plants are so freaking amazing - discussing their evolution, and how their cells are both similar to & different from animal cells.

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    Director:Unknown
    Writer:Unknown
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  8. Background image for ATP & Respiration
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    #7 - ATP & Respiration

    S1:E7

    In which Hank does some push ups for science and describes the "economy" of cellular respiration and the various processes whereby our bodies create energy in the form of ATP.

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    Director:Unknown
    Writer:Unknown
  9. Background image for Photosynthesis
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    #8 - Photosynthesis

    S1:E8

    Hank explains the extremely complex series of reactions whereby plants feed themselves on sunlight, carbon dioxide and water, and also create some by products we're pretty fond of as well.

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    Director:Unknown
    Writer:Unknown
  10. Background image for Heredity
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    #9 - Heredity

    S1:E9

    Hank and his brother John discuss heredity via the gross example of relative ear wax moistness.

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    Director:Unknown
    Writer:Unknown
  11. Background image for DNA Structure and Replication
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    #10 - DNA Structure and Replication

    S1:E10

    Hank introduces us to that wondrous molecule deoxyribonucleic acid - also known as DNA - and explains how it replicates itself in our cells.

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    Director:Unknown
    Writer:Unknown
  12. Background image for DNA, Hot Pockets, & The Longest Word Ever
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    #11 - DNA, Hot Pockets, & The Longest Word Ever

    S1:E11

    Hank imagines himself breaking into the Hot Pockets factory to steal their secret recipes and instruction manuals in order to help us understand how the processes known as DNA transcription and translation allow our cells to build proteins.

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    Director:Unknown
    Writer:Unknown
  13. Background image for Mitosis: Splitting Up is Complicated
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    #12 - Mitosis: Splitting Up is Complicated

    S1:E12

    Hank describes mitosis and cytokinesis - the series of processes our cells go through to divide into two identical copies.

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    Director:Unknown
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  14. Background image for Meiosis: Where the Sex Starts
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    #13 - Meiosis: Where the Sex Starts

    S1:E13

    Hank gets down to the nitty gritty about meiosis, the special type of cell division that is necessary for sexual reproduction in eukaryotic organisms.

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    Director:Unknown
    Writer:Unknown
  15. Background image for Natural Selection
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    #14 - Natural Selection

    S1:E14

    Hank guides us through the process of natural selection, the key mechanism of evolution.

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    Director:Unknown
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  16. Background image for Speciation: Of Ligers & Men
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    #15 - Speciation: Of Ligers & Men

    S1:E15

    Hank explains speciation - the evolutionary process by which new biological species arise - in terms of finches, ligers, mules, and dogs.

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    Director:Unknown
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  17. Background image for Animal Development: We're Just Tubes
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    #16 - Animal Development: We're Just Tubes

    S1:E16

    Hank discusses the process by which organisms grow and develop, maintaining that, in the end, we're all just tubes.

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    Director:Unknown
    Writer:Unknown
  18. Background image for Evolutionary Development: Chicken Teeth
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    #17 - Evolutionary Development: Chicken Teeth

    S1:E17

    Hank introduces us to the relatively new field of evolutionary developmental biology, which compares the developmental processes of different organisms to determine their ancestral relationship, and to discover how those processes evolved.

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    Director:Unknown
    Writer:Unknown
  19. Background image for Population Genetics: When Darwin Met Mendel
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    #18 - Population Genetics: When Darwin Met Mendel

    S1:E18

    Hank talks about population genetics, which helps to explain the evolution of populations over time by combing the principles of Mendel and Darwin, and by means of the Hardy-Weinberg equation.

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    Director:Unknown
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  20. Background image for Taxonomy: Life's Filing System
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    #19 - Taxonomy: Life's Filing System

    S1:E19

    Hank tells us the background story and explains the importance of the science of classifying living things, also known as taxonomy.

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    Director:Unknown
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  21. Background image for Evolution: It's a Thing
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    #20 - Evolution: It's a Thing

    S1:E20

    Hank gets real with us in a discussion of evolution - it's a thing, not a debate. Gene distribution changes over time, across successive generations, to give rise to diversity at every level of biological organization.

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    Director:Unknown
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  22. Background image for Comparative Anatomy: What Makes Us Animals
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    #21 - Comparative Anatomy: What Makes Us Animals

    S1:E21

    Hank introduces us to comparative anatomy, which studies the similarities and differences in animal anatomy to support the theory of evolution and the shared ancestry of living things.

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    Director:Unknown
    Writer:Unknown
  23. Background image for Simple Animals: Sponges, Jellies, & Octopuses
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    #22 - Simple Animals: Sponges, Jellies, & Octopuses

    S1:E22

    Hank introduces us to the "simplest" of the animals, complexity-wise: beginning with sponges (whose very inclusion in the list as "animals" has been called into question because they are so simple) and finishing with the most complex molluscs, octopuses and squid. We differentiate them by the number of tissue layers they have, and by the complexity of those layers.

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    Director:Unknown
    Writer:Unknown
  24. Background image for Complex Animals: Annelids & Arthropods
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    #23 - Complex Animals: Annelids & Arthropods

    S1:E23

    Hank continues our exploration of animal phyla with the more complexly organized annelida and arthropoda, and a biolography on insects.

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    Director:Unknown
    Writer:Unknown
  25. Background image for Chordates
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    #24 - Chordates

    S1:E24

    Hank introduces us to ourselves by taking us on a journey through the fascinatingly diverse phyla known as chordata. And the next time someone asks you who you are, you can give them the facts: you're a mammalian amniotic tetrapodal sarcopterygian osteichthyen gnathostomal vertebrate cranial chordate.

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    Director:Unknown
    Writer:Unknown
  26. Background image for Animal Behavior
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    #25 - Animal Behavior

    S1:E25

    Hank and his cat Cameo help teach us about animal behavior and how we can discover why animals do the things they do.

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    Director:Unknown
    Writer:Unknown

Best Episodes Summary

"That's Why Carbon Is A Tramp" is the best rated episode of "Crash Course Biology". It scored /10 based on 0 votes. Directed by Unknown and written by Unknown, it aired on 1/30/2012. This episode scored 0.0 points higher than the second highest rated, "Water - Liquid Awesome".