SCIENCE
ENVIRONMENTAL SCIENCES
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They are microscopic.
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Their cells have no nucleus.
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They have no vertebrae.
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They only live in harsh environments.
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Detailed explanation-1: -Bacteria: cells do not contain a nucleus. Archaea: cells do not contain a nucleus; they have a different cell wall from bacteria. Eukarya: cells do contain a nucleus.
Detailed explanation-2: -Kingdom Monera contains the least organized unicellular prokaryotic microorganisms on earth. Both archaebacteria and eubacteria are unicellular microorganisms, which are usually called prokaryotes. Archaebacteria are usually found in extreme conditions whereas eubacteria are found everywhere on the surface of Earth.
Detailed explanation-3: -Cell walls: virtually all bacteria contain peptidoglycan in their cell walls; however, archaea and eukaryotes lack peptidoglycan. Various types of cell walls exist in the archaea. Therefore, the absence or presence of peptidoglycan is a distinguishing feature between the archaea and bacteria.