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- Season 1 That's Why Carbon Is A Tramp
- Season 1 Water - Liquid Awesome
- Season 1 Biological Molecules - You Are What You Eat
- Season 1 Eukaryopolis - The City of Animal Cells
- Season 1 In Da Club - Membranes & Transport
- Season 1 Plant Cells
- Season 1 ATP & Respiration
- Season 1 Photosynthesis
- Season 1 Heredity
- Season 1 DNA Structure and Replication
- Season 1 DNA, Hot Pockets, & The Longest Word Ever
- Season 1 Mitosis: Splitting Up is Complicated
- Season 1 Meiosis: Where the Sex Starts
- Season 1 Natural Selection
- Season 1 Speciation: Of Ligers & Men
- Season 1 Animal Development: We're Just Tubes
- Season 1 Evolutionary Development: Chicken Teeth
- Season 1 Population Genetics: When Darwin Met Mendel
- Season 1 Taxonomy: Life's Filing System
- Season 1 Evolution: It's a Thing
- Season 1 Comparative Anatomy: What Makes Us Animals
- Season 1 Simple Animals: Sponges, Jellies, & Octopuses
- Season 1 Complex Animals: Annelids & Arthropods
- Season 1 Chordates
- Season 1 Animal Behavior
- Season 1 The Nervous System
- Season 1 Circulatory & Respiratory Systems
- Season 1 The Digestive System
- Season 1 The Excretory System: From Your Heart to the Toilet
- Season 1 The Skeletal System: It's ALIVE!
- Season 1 Big Guns: The Muscular System
- Season 1 Your Immune System: Natural Born Killer
- Season 1 Great Glands - Your Endocrine System
- Season 1 The Reproductive System: How Gonads Go
- Season 1 Old & Odd: Archaea, Bacteria & Protists
- Season 1 The Sex Lives of Nonvascular Plants: Alternation of Generations
- Season 1 Vascular Plants = Winning!
- Season 1 The Plants & The Bees: Plant Reproduction
- Season 1 Fungi: Death Becomes Them
- Season 1 Ecology - Rules for Living on Earth
Crash Course Biology - Season 1 Episode 17 Evolutionary Development: Chicken Teeth
1.50 15 minutes 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.
