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.
