Crash Course Biology #1 - Natural Selection - Crash Course Biology #14

Hank guides us through the process of natural selection, the key mechanism of evolution. Table of Contents: 1) Natural Selection 1:27 2) Adaptation 2:56 3) Fitness 3:36 4) Four Principals 3:54 a. Variations 4:01 b. Heritability 4:17 c. "The Struggle for Existence" 4:25 d. Survival and Reproductive Rates 5:00 5) Biolography 5:59 6) Modes of Selection 7:40 a. Directional Selection 8:17 b. Stabilizing Selection 8:56 c. Disruptive Selection 9:27 7) Sexual Selection 10:22 8) Artificial Selection 11:24 References: http://curiosity.discovery.com/topic/ecology-and-evolution/10-examples-natural-selection.htm http://www.globalchange.umich.edu/globalchange1/current/lectures/selection/selection.html http://blogs.scientificamerican.com/observations/2010/05/03/charles-darwins-family-tree-tangled-with-inbreeding-early-death/ http://www.aibs.org/bioscience-press-releases/resources/Berra.pdf http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20101/bio%20101%20lectures/Natural%20Selection/natural.htm http://www.irac-online.org/about/resistance/ http://www.pbs.org/wgbh/evolution/library/01/6/l_016_09.html http://evolution.berkeley.edu/evolibrary/article/evo_30 This video uses the following sounds from Freesound.org: "20071104.forest.04.binaural.mp3" by dobroide "ForestBirds.wav" by HerbertBoland Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: http://www.youtube.com/crashcoursekids