Aug 6 2009, 05:08 PM
QUOTE(spursfan @ Aug 6 2009, 09:13 AM)
yes ... there's theories that humans originate from viruses ... dunno whether the theory applies to other life forms
I dont think is originate from viruses, but bacteria....For all eukaryotic cells, the ribosome is 80S while in organelle mitochondria and chloroplast, they have 70S ribosomes. And mitochondria and chloroplast is actually quite well built organelle(The structure inside is quite complete such as got DNA). It shows that our mitochondria and chloroplast is actually evolve from bacteria.
In my opinion, all thing starts from singularity(universe also!). I believe that archae bacteria is the ancestor for all living thing. In ice age, only archae bacteria can survive because they can live in extreme/harsh condition. Then it is later evolve to bacteria, follow by protoctista (Algae have the some characteristic of bacteria ) And again, follow by Fungi and Plantae (Whichever come first not clear) Lastly, mammalia.
About virus, I think is obligate intercellular living thing.
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