Fact 1: Prokaryotes are single-celled organisms that lack a nucleus. Fact 2: Bacteria and archaebacteria are prokaryotes. Given the two facts above, answer the question "Bacteria and archaebacteria examples of what?" with the following options: - grass - multi-celled organisms - seeds - Something that causes allergies - major threat to health - single-celled organisms - microorganisms - Food poisoning
single-celled organisms