Which of the following are single-celled organisms? Select all that apply.
e.All of the above
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The correct answer is both a and b. Archaea and Bacteria are domains that consist of prokaryotes. Eukaryotes only make up about 33% of organisms. The kingdom Archaea has most of the “extremophiles” being home to organisms that can tolerate highly warm, salty, and cold environments, and some are also pressure and pH tolerant.