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Prokaryotic fossils have been dated to 3.5 billion years ago, but it is not possible to determine by their shape if they were Archaea. Some lipids, consistent with eukaryotes or archaea, have been detected in shale dating to 2.7 billion years ago. The split between bacteria and archaea probably occurred earlier than that; the lipid remnants could be from either one or both. In light of genetic research since the 1960s, it is no longer held as a certainty that eukaryotes developed from archaea; they may have developed as separate, parallel lines of descent from primordial organisms. That is why the term "archaebacteria" has fallen out of use; Archaea are now classified as a separate domain of living organisms from Bacteria.

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13y ago
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1w ago

Archaebacteria, also known as archaea, first appeared around 3.8 billion years ago. They are one of the oldest forms of life on Earth and have evolved to thrive in extreme environments.

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Q: When did archaebacteria first appear?
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What arose first archaebacteria animals fungi plants protists?

Archaebacteria


When did the first Archaebacteria appear?

The prokaryotic cells first appeared about 3 billion years ago. Scientists are not sure but perhaps a few of these bacteria could have been archaea. These appeared in the Pre-Cambrian Era


What are believed to be the ancestors of the protists and first eukaryotes?

Archaebacteria


The archaebacteria were probably the first what?

they were probably the first multicelluar life- forms


What is the common name for the Archaebacteria kingdom?

Archaebacteria


What is archaebacteria where does it live and what it feeds on or produces?

Archaebacteria lives in the bottom of the ocean. Archaebacteria lives in the bottom of the ocean.


What is one kind of archaebacteria?

one kind of archaebacteria is the methanogens


What kingdom does the archaebacteria belong to?

They have their own kingdom called Archaebacteria.


Do archaebacteria have cell wall?

Yes, archaebacteria have a cell wall.


Are archaebacteria and eubacteria both protists?

Both archaebacteria and eubacteria


Does archaebacteria have complex cells?

archaebacteria consists of complex cells


What are three typess of archaebacteria?

Here are the 3 types of Archaebacteria Archaebacteria>>>>> 1. Methanogens 2. Halophiles 3. Thermoacidiophiles