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-as of [22 MARCH 2024]–
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-the [3 domain system]-
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*HETHRIUM*
(aka ‘archaea’?)
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*NON-HETHRIUM*
(aka ‘eukaryota’?)
(if this were the case, wouldn’t ‘bacteria’ be part of the ‘non-hethrium’ domain?)
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[the 3-domain system is a biological classification introduced by ‘carl woese’ et al. in 1990 that divides ‘cellular life’ forms into 3 domains…]
‘archaea‘
‘bacteria‘
‘eukaryote‘
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(in particular, it emphasizes the separation of ‘pro-karyotes’ into 2 groups, originally called eubacteria (now bacteria) + archaebacteria (now archaea))
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(‘woese’ argued that – on the basis of differences in ’16S rRNA genes’ – these 2 groups + the ‘eukaryote’s each arose separately from an ancestor with poorly developed genetic machinery, (often called a ‘progenote’))
To reflect these primary lines of descent, he treated each as a domain, divided into several different kingdoms.
Woese initially used the term “kingdom” to refer to the three primary phylogenic groupings, and this nomenclature was widely used until the term “domain” was adopted in 1990.
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(parts of the ‘3-domain theory’ have been challenged by scientists such as ‘radhey gupta’, who argues that the ‘primary division’ within ‘pro-karyotes’ should be between…)
*those surrounded by a single membrane*
VS
*those surrounded by 2 ‘membranes’*
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*👨🔬🕵️♀️🙇♀️*SKETCHES*🙇♂️👩🔬🕵️♂️*
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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥