> Are there any organisms universally considered "living" (so excludes
> viruses) that are simpler than bacteria? I'd appreciate any references
> you may have. Thank you.
>
> Khan
Mycoplasmas and rickettsias (although arguably both are mostly
bacteria-like).

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Larry D. Farrell, Ph.D.
Professor of Microbiology
Idaho State University
N10 - 10 Mar 2005 23:00 GMT
>> Are there any organisms universally considered "living" (so excludes
>> viruses) that are simpler than bacteria? I'd appreciate any references
[quoted text clipped - 4 lines]
> Mycoplasmas and rickettsias (although arguably both are mostly
> bacteria-like).
Hi Kahn
I agree with Larry.
Related to your question though you might care to look up a few references
on the possible origions of mitochondria. :)
You might also research Chlamydia : you could start here
http://mic.sgmjournals.org/cgi/content/full/146/11/2723
Do well
Egards N10