Evolution What’s missing??

How did life evolve? Were the first life forms heterotrophic or autotrophic? How could cellular form take place?

NH2 CH4 H20 H2 VOLCANOES RELEASE GASES INTO THE ATMOSPHERE UV RADIATION LIGHTNING NH2 CH4 H20 H2 HETEROTROPHIC PROKARYOTES IN ANAEROBIC ENVIRONMENT CELL PRECURSORS-PROTOBIONTS FORM FORMATION OF SIMPLE ORGANIC MOLECULES-amino acids, fatty acids…

Autotrophic prokaryotes appear = photosynthesis O2 and ozone layer appear Build up of CO2 from anaerobic respiration Natural selection Symbiotic relationships of prokaryotes leads to creation of eukaryotes = endosymbiont theory La, la, la, la life goes on…

ENDOSYMBIOTIC THEORY http://highered.mcgraw-hill.com/sites/9834092339/student_view0/chapter4/animation_-_endosymbiosis.html