Eukaryotes

Cross references:  Prokaryotes    Prokaryote Colonies    
Eukaryote Colonies     Slime Molds      Parazoa   

Neoproterozoic (Wiki) 
http://en.wikipedia.org/wiki/Neoproterozoic 
1 billion to 542 million years ago. 

Eukaryote (Wiki) 
http://en.wikipedia.org/wiki/Eukaryote
 


Eukaryota Classification 
   

I found the table, below, at the bottom of the article: 

Choanoflagellate (Wiki)  
http://en.wikipedia.org/wiki/Choanoflagellate

All of the links are active.  We humans are near the lower right-hand corner under "Metazoa>Eumetazoa".  Although links to "Archaea" and "Bacteria" are provided at the top, all the other links are to Eukaryota.   

Eukaryota classification

Domain : Archaea - Bacteria - Eukaryota

Bikonta







Unikonta






I don't know how much use I'll be making of this table, but I wanted to put it someplace where I could find it quickly if I wanted to, and this seemed like the logical place.  Although I vaguely realized that there are lots of different kinds of eukaryotes, this is more than I expected.   


Difference between Prokaryotes and Eukaryotes (Goog) 

http://microbiology.suite101.com/article.cfm/prokaryotic_and_eukaryotic_cells 

    Cells Alive (Goog) 
   
http://www.cellsalive.com/toc_cellbio.htm 
    This is one of the links available from the "Difference..." link, above. 
   


Microbiota from Snowball Earth (Wiki) 
http://www.pnas.org/content/100/8/4399.full 
There is already fossil evidence for Eukaryotes 700Ma (million years ago), almost 200ma before the Cambrian Explosion. 

"
It is well known that several key clades of eukaryotic autotrophs (e.g., algae) and heterotrophs (e.g., testate amoebae) predate the first severe Neoproterozoic glaciation (known as the Sturtian glaciation, ≈750–700 Ma).

Historylines Eukaryote (Goog) 
http://www.historylines.net/history/Biology/eukaryote.html 

   
Choanoflagellate (Wiki)  
http://en.wikipedia.org/wiki/Choanoflagellate
"The choanoflagellates are a group of free-living unicellular and colonial flagellate eukaryotes considered to be the closest living relatives of the animals."  See:  Parazoa  .  It seems to be widely agreed that the Parazoa, which are the simplest multi-cellular animals, evolved from the choanoflagellates and that the more complex animals, the Eumetazoa, then evolved from the Parazoa. 


Note: 

Although PubMed identified only
160 articles when I searched for the term "prokaryotes hormone", it identified 1,039,104 articles when I searched for "eukaryote hormone".   Narrowing the search to "eukaryote hormone receptor evolution" still yielded 1,419 articles.      

Similarly, PubMed identified only 58 articles when I searched for the term "prokaryote neurotransmitter", but 914,601 when I searched for "eukaryote neurotransmitter".  Narrowing the search to "eukaryote neurotransmitter evolution" still yielded 3368. 



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