Old Odd: Archaea, Bacteria Protists - CrashCourse Biology #35

Hank veers away from human anatomy to teach us about the (mostly) single-celled organisms that make up two of the three taxonomic domains of life, and one of the four kingdoms: Archaea, Bacteria, and Protists. They are by far the most abundant organisms on Earth, and are our oldest, oddest relatives. Crash Course World History is now available on DVD! http://dft.ba/-8bCC Like Crash Course? http://www.facebook.com/YouTubeCrashCourse Follow Crash Course! http://www.twitter.com/TheCrashCourse References for

• #تحصیلات_و_یادگیری
• #archaea
• #biology
• #crash_course