In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statement is true about archaea?
Archaea completely differ from both prokaryotes and eukaryotes.
Archaea completely differ from prokaryotes.
Archaea resemble eukarya in all respects.
Archaea have some novel features that are absent in other prokaryotes and eukaryotes.
A
Archaea completely differ from prokaryotes.
B
Archaea resemble eukarya in all respects.
C
Archaea have some novel features that are absent in other prokaryotes and eukaryotes.
D
Archaea completely differ from both prokaryotes and eukaryotes.
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Solution
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The archaebacteria are placed in a different kingdom from the plants and animals. The archaebacteria are the organisms that have certain properties which are not common to the organisms placed in bacteria and eukarya. The group contains methanogens that can produce methane gas. The DNA of these organisms is generally present in a relaxed state or as positively coiled. The cell wall of these organisms does not contain lipids, peptidoglycan, etc.
Thus, the correct answer is option D.
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