Question

___________ are the oldest organisms and are divided into two groups, the acheabacteria and the eubacteria.

Answer 1

Prokaryotes (2 billion years ago)

Answer 2

Prokaryotes are the oldest organisms and are divided into two groups, the acheabacteria and the eubacteria.

Step-by-step explanation:

Organisms are divided into two mains groups, prokaryotes and eukaryotes, in 1977 Carl Woese separated prokaryotes into two subgroups:

• Eubacteria, the most common bacteria form, some examples of these bacteria are probiotic and pathogenic
• Archaea, consisting of extremophiles

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