KEY TAKEAWAYS •
There are three main domains in living things, including Bacteria, Archaea, and Eukarya.
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Among the kingdoms, there are six different kingdoms, most of them belonging to Eukarya, although there are many more bacteria and archaea species on earth when compared to eukaryotes.
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Archaea is one of the domains, with Archaebacteria being the kingdom. These are prokaryotes and have their own characteristics different from bacteria and eukaryotes.
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Protista is a kingdom among Eukarya that consists mainly of unicellular organisms.
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There are many major and minor animal phyla that include Arthropoda, which is the largest phylum among the Animalia kingdom.
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