Chapter 18 Classification of Organisms

Kingdom Animalia- Eukaryotic, multicellular, heterotrophic organisms. Ex. fish, dogs, worms, humans. 3-Domain System- another way of classifying organisms based on the sequences of ribosomal RNA. Even prokaryotes contain RNA. Carl Woese (1928-) used ribosomal RNA to estimate how long ago pairs of different organisms shared a common ancestor. ................
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