Take note of fig 26.3 1. Plants form a monophyletic group with green algae. Perhaps the first great extinction as anarobes died in the presence of oxygen. Membrane bound orgenelle in the cytosol. Origin of nucleus fig 28.2, pg 523- pinching off of invaginated functional membranes gave rise to the endomembrane system and the nucleus.
Organelles are Bacterial endosymbionts in Archaeal hosts.
A. Bacteria as the symbiont 1. Morphological and biochemical evidence show a close relationship to Bacteria 1. Size is similar 2. Circular chromosome not linear 3. Reproduce independently of the cell cycle by binary fission like process 4. enzymes and membrane transport systems with in organelles similar to modern prokaryotes.