## Unit: Natural selection

### introduction to evolution and natural selection
https://cdn.kastatic.org/ka-youtube-converted/GcjgWov7mTM.mp4/GcjgWov7mTM.mp4

### natural selection and the owl butterfly
https://cdn.kastatic.org/ka-youtube-converted/dR_BFmDMRaI.mp4/dR_BFmDMRaI.mp4

### biodiversity and natural selection two
https://cdn.kastatic.org/ka-youtube-converted/sNgsCT0E7Es.mp4/sNgsCT0E7Es.mp4

### variation in a species
https://cdn.kastatic.org/ka-youtube-converted/DuArVnT1i-E.mp4/DuArVnT1i-E.mp4

### artificial selection and domestication
https://cdn.kastatic.org/ka-youtube-converted/hFjGQXcwYIk.mp4/hFjGQXcwYIk.mp4
https://cdn.kastatic.org/ka-youtube-converted/hFjGQXcwYIk.mp4-low/hFjGQXcwYIk-low.mp4
https://cdn.kastatic.org/ka-youtube-converted/hFjGQXcwYIk.mp4-low-ios/hFjGQXcwYIk-low-ios.mp4

### genetic drift bottleneck effect and founder effect
https://cdn.kastatic.org/ka-youtube-converted/IRTn0iNkAHI.mp4/IRTn0iNkAHI.mp4
https://cdn.kastatic.org/ka-youtube-converted/IRTn0iNkAHI.mp4-low/IRTn0iNkAHI-low.mp4

### dna spells evolution
https://cdn.kastatic.org/ka-youtube-converted/uI_Q1kjmfxo.mp4/uI_Q1kjmfxo.mp4

### variation in a species
https://cdn.kastatic.org/ka-youtube-converted/DuArVnT1i-E.mp4/DuArVnT1i-E.mp4

### allele frequency
https://cdn.kastatic.org/ka-youtube-converted/Bc9bhLk_AhI.mp4/Bc9bhLk_AhI.mp4

### hardy weinberg
https://cdn.kastatic.org/ka-youtube-converted/oc9fJCAIRJs.mp4/oc9fJCAIRJs.mp4

### applying hardy weinberg
https://cdn.kastatic.org/ka-youtube-converted/D5NVlAaT-OA.mp4/D5NVlAaT-OA.mp4

### discussions of conditions for hardy weinberg
https://cdn.kastatic.org/ka-youtube-converted/Q618DALi2eo.mp4/Q618DALi2eo.mp4
https://cdn.kastatic.org/ka-youtube-converted/Q618DALi2eo.mp4-low/Q618DALi2eo-low.mp4

### evidence for evolution
https://cdn.kastatic.org/ka-youtube-converted/Q-aGAX27SIo.mp4/Q-aGAX27SIo.mp4
https://cdn.kastatic.org/ka-youtube-converted/Q-aGAX27SIo.mp4-low/Q-aGAX27SIo-low.mp4

### fossils rocking the earth
https://cdn.kastatic.org/ka-youtube-converted/rSWwmN5ozQ0.mp4/rSWwmN5ozQ0.mp4

### biogeography where life lives
https://cdn.kastatic.org/ka-youtube-converted/2UQC5ts6hUs.mp4/2UQC5ts6hUs.mp4

### molecular evidence for evolutionary relationships examples
https://cdn.kastatic.org/ka-youtube-converted/mHH0sSm2cK8.mp4/mHH0sSm2cK8.mp4
https://cdn.kastatic.org/ka-youtube-converted/mHH0sSm2cK8.mp4-low/mHH0sSm2cK8-low.mp4
https://cdn.kastatic.org/ka-youtube-converted/mHH0sSm2cK8.mp4-low-ios/mHH0sSm2cK8-low-ios.mp4

### carbon 14 dating 1
https://cdn.kastatic.org/ka-youtube-converted/8wYvKeSK1IY.mp4/8wYvKeSK1IY.mp4

### evidence for evolution
https://cdn.kastatic.org/ka-youtube-converted/Q-aGAX27SIo.mp4/Q-aGAX27SIo.mp4
https://cdn.kastatic.org/ka-youtube-converted/Q-aGAX27SIo.mp4-low/Q-aGAX27SIo-low.mp4

### organelles in eukaryotic cells
https://cdn.kastatic.org/ka-youtube-converted/bWPQvxElpLY.mp4/bWPQvxElpLY.mp4
https://cdn.kastatic.org/ka-youtube-converted/bWPQvxElpLY.mp4-low/bWPQvxElpLY-low.mp4
https://cdn.kastatic.org/ka-youtube-converted/bWPQvxElpLY.mp4-low-ios/bWPQvxElpLY-low-ios.mp4

### cellular evidence of common ancestry
https://cdn.kastatic.org/ka-youtube-converted/BwwElHbjTGo.mp4/BwwElHbjTGo.mp4
https://cdn.kastatic.org/ka-youtube-converted/BwwElHbjTGo.mp4-low/BwwElHbjTGo-low.mp4
https://cdn.kastatic.org/ka-youtube-converted/BwwElHbjTGo.mp4-low-ios/BwwElHbjTGo-low-ios.mp4

### taxonomy and the tree of life
https://cdn.kastatic.org/ka-youtube-converted/oHvLlS_Sc54.mp4/oHvLlS_Sc54.mp4

### discovering the tree of life
https://cdn.kastatic.org/ka-youtube-converted/AjvLQJ6PIiU.mp4/AjvLQJ6PIiU.mp4

### understanding and building phylogenetic trees or cladograms
https://cdn.kastatic.org/ka-youtube-converted/6_XMKmFQ_w8.mp4/6_XMKmFQ_w8.mp4
https://cdn.kastatic.org/ka-youtube-converted/6_XMKmFQ_w8.mp4-low/6_XMKmFQ_w8-low.mp4

### species
https://cdn.kastatic.org/ka-youtube-converted/Tmt4zrDK3dA.mp4/Tmt4zrDK3dA.mp4

### allopatric and sympatric speciation
https://cdn.kastatic.org/ka-youtube-converted/gnku5AksWvU.mp4/gnku5AksWvU.mp4
https://cdn.kastatic.org/ka-youtube-converted/gnku5AksWvU.mp4-low/gnku5AksWvU-low.mp4

### reproductive isolation
https://cdn.kastatic.org/ka-youtube-converted/vmgKC2IJjOI.mp4/vmgKC2IJjOI.mp4

### new localities lead to new biodiversity
https://cdn.kastatic.org/ka-youtube-converted/ACxH7ZVUOLk.mp4/ACxH7ZVUOLk.mp4

### biodiversity and extinction then and now
https://cdn.kastatic.org/ka-youtube-converted/v8PPsI0LqOY.mp4/v8PPsI0LqOY.mp4

### new localities lead to new biodiversity
https://cdn.kastatic.org/ka-youtube-converted/ACxH7ZVUOLk.mp4/ACxH7ZVUOLk.mp4

### introduction to evolution and natural selection
https://cdn.kastatic.org/ka-youtube-converted/GcjgWov7mTM.mp4/GcjgWov7mTM.mp4

### variation in a species
https://cdn.kastatic.org/ka-youtube-converted/DuArVnT1i-E.mp4/DuArVnT1i-E.mp4

### population diversity and resilience
https://cdn.kastatic.org/ka-youtube-converted/3NdTUkjwehs.mp4/3NdTUkjwehs.mp4
https://cdn.kastatic.org/ka-youtube-converted/3NdTUkjwehs.mp4-low/3NdTUkjwehs-low.mp4
https://cdn.kastatic.org/ka-youtube-converted/3NdTUkjwehs.mp4-low-ios/3NdTUkjwehs-low-ios.mp4

### earth formation
https://cdn.kastatic.org/ka-youtube-converted/VbNXh0GaLYo.mp4/VbNXh0GaLYo.mp4

### beginnings of life
https://cdn.kastatic.org/ka-youtube-converted/nYFuxTXDj90.mp4/nYFuxTXDj90.mp4

### origins of life
https://cdn.kastatic.org/ka-youtube-converted/rMuj2MGeIAc.mp4/rMuj2MGeIAc.mp4
https://cdn.kastatic.org/ka-youtube-converted/rMuj2MGeIAc.mp4-low/rMuj2MGeIAc-low.mp4

### originoflife
https://cdn.kastatic.org/ka-youtube-converted/VYQQD0KNOis.mp4/VYQQD0KNOis.mp4
