On Mon, 24 Nov 2003 16:30:40 +0000 (UTC), Joachim Pense
 wrote:

>Having learned in a recent thread ("first life form on
earth") that it is
>time to refresh what I had learned in school long ago, I found that
>biologists today classify the life forms into five kingdoms:
>
>- Animal Kingdom: organisms that usually move around and find their own
>food. 
>- Plant Kingdom: organisms that make their own food and do not
>actively move around. 
>- Fungi Kingdom: organisms that absorb food from living and non-living
>things. 
>- Protist Kingdom: organisms that have single, complex cells.
>- Moneran Kingdom: organisms that have single, simple cells.
>
>This leads me to the question: how are these kingdoms related evolutionary?
>
>To me it looks like the Animal Kingdom consists by definition of
>multicellular organisms only, otherwise the Protist Kingdom would be a
>part of the Animal Kingdom. Is this conclusion right?
>
>I guess that the animals are evolved from colonies of protists. 
>
>I wildly guess that the fungi have evolved from the plants. Correct?
>
>But what is the single-celled version of the plants? Are they also called
>plants, or are they protists, too (which I do not believe). I do not think
>that cynaobacteria (belonging to the Moneran Kingdom) are the candidates,
>because plants have complex cells. Or maybe monocellular plants just do
>not exist?
>
>Can there any order be established which kingdom evolved from which? Does
>it even make sense to discuss this sort of question?
>
>Joachim

As I have indicated in the other thread, you really do need to read a
good intro biology text.  Also, most biologists now go with the three
domain - six kingdom breakdown of living things, not the older five
kingdom.

Here are some web sources.  Note that most web pages are either highly
technical or just lecture notes from courses and are intended for
people who have already heard the lectures.
   http://www.ucmp.berkeley.edu/education/events/eukevol1.html
  http://www.palaeos.com/Kingdoms/default.htm
http://campus.murraystate.edu/academic/faculty/Howard.Whiteman/Bio199/Bio199NotesPDF/Microb.pdf
  http://www.biols.susx.ac.uk/ugteach/cws/syst/domains.htm
  http://www.biols.susx.ac.uk/ugteach/cws/syst/kingdoms.htm
http://science.kennesaw.edu/biophys/biodiversity/kingdoms.htm

The multicellular eukaryotes all evolved from single celled eukaryotes
who belong to the kingdom Protista.  There are "animal-like" protists
and "plant-like" protists l and "fungus-like" protists.
 There are
most definitely single-cell plant-like things called algae.  The plant
are very closely related and almost certainly evolved from one group
of algae called the chlorophyta, the green algae.  The blue-green
bacteria  or cynaobacteria used to be called blue-green algae.  These
seem to be the ancestors of the chloroplasts in plants, the cell
organelle where photosynthesis occurs.  That relates to the origins of
eukaryotes in the endosymbiont theory, too complex to explain in
detail here.  Google it for more.
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