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''Parakaryon myojinensis'' is a single-celled organism known by a unique example. "()his organism appears to be a life form distinct from prokaryotes and eukaryotes", with features of both. ==Classification== It is not clear that the Parakaryon myojinensis can be classified as either a eukaryote or a prokaryote. (The two kinds of organisms known so far.) *Eukaryotes are organisms with one or more complex cells which contain a nucleus. All plants, animals, fungi, etc. are composed from eukaryotic cells. *Prokaryotes are simple cells without a nucleus: bacteria and archaea. The newly discovered organism has a nucleus and other endosymbionts (organisms living within other cells), so would appear to be a eukaryote. However the nuclear membrane is a single layer, not a double layer as in other eukaryotes, and the DNA is stored in filaments as in bacteria, which are prokaryotes. So this organism has not been classified as either a eukaryote or a prokaryote. Adding to the difficulties of classification, is that only one instance of this organism has been discovered to date. So scientists have not been able to do further observations of it. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Parakaryon myojinensis」の詳細全文を読む スポンサード リンク
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