SCIENCE
VIRUS AND BACTERIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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orders
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kingdoms
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domains
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families
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Detailed explanation-1: -Life on earth is classified into three domains : Bacteria, Archaea and Eukarya. The first two consist completely of single-celled microbes. None of them have a nucleus.
Detailed explanation-2: -The three domains are the Archaea, the Bacteria, and the Eukarya. Prokaryotic organisms belong either to the domain Archaea or the domain Bacteria; organisms with eukaryotic cells belong to the domain Eukarya.
Detailed explanation-3: -Both Bacteria and Archaea are prokaryotes, single-celled microorganisms with no nuclei, and Eukarya includes us and all other animals, plants, fungi, and single-celled protists – all organisms whose cells have nuclei to enclose their DNA apart from the rest of the cell.
Detailed explanation-4: -Archaea differ from bacteria in cell wall composition and differ from both bacteria and eukaryotes in membrane composition and rRNA type. These differences are substantial enough to warrant that archaea have a separate domain.
Detailed explanation-5: -Even under this new network perspective, the three domains of cellular life-Bacteria, Archaea, and Eukarya-remain objectively distinct.