Beschreibung
(/).,. ~ E ~-----i~ § ",0) SUN. _----I-§ ~ ____ ~Iw g> 'Vi. ~ ~., E üg - - -- symbiogenesis 2., "'0) '. ~~~------ PROKARYOTES ~ EUKARYOTES c. y~Euro"e:-A-C---"" ~ ~ ,. ,----~ TEA\A ~. ~ 8 (Xl0 YEARS AGO) 30 25 20 15 10 5 0 45 40 35 ~L-__ ~LLJ-~-L~-L~~J-LL-L~-L~~J-LL-L~-L~-L~~-L~-L~-L~-LJ-W~ o z W Classical Ul Fossil Record Figure 1. 8 The origins of the live Kingdoms (shown in bold capitals). This lollows the Margulis classification where the major division is between the prokaryotes (Monera), without a well-delined nucleus and with only one source 01 genetic code, and the nucleate eukaryotes which have more than one. Associations have been formed through evolutionary history so that symbiogen esis (shown by the hatched lines) produced structures we observe today inside the cells of higher plants and animals but wh ich evolved independently in the first instance. At various stages the additions 01 microtubules, mitochondria and plastids have meant the advent 01 animals, lungi and plants. techniques of making tools and of working within Evolution operates on the code stored in the groups would benefit from a precise language, all of genes. Replication of the molecules carrying this which fostered mental development. In time, the code requires a means of storing and releasing en adaptability of mental skills made for a more adapt ergy. Replication and metabolism must have devel able species. oped closely together.
