Final answer:
The first divergence on the phylogenetic 'tree of life' was between Archaea and Eubacteria, marking a significant event in evolutionary history.
Explanation:
The first divergence on the phylogenetic 'tree of life' was between Archaea and Eubacteria (Prokaryota). This separation indicates the earliest split in the evolutionary history of organisms.
Microbiologist Carl Woese's work based on ribosomal RNA genes provided insights into the distinct domains of life, including Bacteria, Archaea, and Eukarya.
Through genetic analysis, it has been established that Archaea and Bacteria, both prokaryotes, branched off early in evolutionary history, highlighting their ancient origins.
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