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,...
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We've spent the past few months talking about animals here on Crash Course, specifically human animals, because... well, because humans... we love talking about ourselves, and also because animals are just really interesting. But it's high time that we talked about the rest of the living world. Because I hate to break it to ya, but most of the alive things on Earth are single-celled organisms. And by "most of the alive things" I mean that these organisms make up two of the three taxonomic domains of all life, plus one of the four kingdoms. I'm talking about archaea, bacteria and protists. With the exception of a few protists, they're all unicellular, and they are, by far, the most abundant and diverse organisms on Earth. ...
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We've spent the past few months talking about animals here on Crash Course, specifically human animals, because... well, because humans... we love talking about ourselves, and also because animals are just really interesting. But it's high time that we talked about the rest of the living world. Because I hate to break it to ya, but most of the alive things on Earth are single-celled organisms. And by "most of the alive things" I mean that these organisms make up two of the three taxonomic domains of all life, plus one of the four kingdoms. I'm talking about archaea, bacteria and protists. With the exception of a few protists, they're all unicellular, and they are, by far, the most abundant and diverse organisms on Earth. ...
