X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/chloroplast13.git/blobdiff_plain/c4e790fc4e8c0442d8ffa296055c2407238ce291..9771923779498f5cbf4e21e9389062ac5d5cbb11:/intro.tex?ds=inline

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+++ b/intro.tex
@@ -17,10 +17,10 @@ in the atmosphere (allowing extant life) and are the main source of mid-
 to long term carbon stockage (using atmospheric CO2, important in the 
 context of climate change). Chloroplast found in Eucaryots have an endosymbiotic origin, meaning 
 that they are a fusion of a photosynthetic bacteria (Cyanobacteria) and 
-a eucaryotic cell (enable to produce organic matter = heterotrophic). 
-This fusion or First Endiosymbiosis ended in a Great diversification of 
-a lineage comprising Red Algae, Green Algae and Land Plants (terrestrial).
-Several Second Enbiosymbioses occurred then: two involving a Red 
-Algae and other heterotrophic eucaryotes and giving birth to both Brown 
-Algae and Dinoflagellates lineages; another involving a Green Algae and 
-a heterotrophic eucaryot and giving birth to Euglens.
\ No newline at end of file
+a eucaryotic cell (enable to produce organic matter from solar energy = heterotrophic). \\
+
+By  the  principle  of
+classification, a  small number of genes lost  among species indicates
+that these species are close to  each other and belong to same family,
+while a  large lost  means that we  have an  evolutionary relationship
+between species  from different families.