N2 H. Cyanobacteria 1. Often colonial a. filamentous - cells connected in chains, usually sharing adjacent cell walls. I. Photosynthesis evolved in the cyanobacteria. A. Single origin of life 1. 4.6 bya - earth formed 2. Cyanobacteria - origins of photosynthesis 5.
Eukaryotic photosynthesis is the result of endosymbiosis.
The evidence for symbiosis 1. Double membranes 2. Contain own prokaryote-like ribosomes 3. Contain prokaryote-like DNA 4. Overview of Photosynthesis.