Order the events in which cells acquired mitochondria, as proposed by the endosy

Question

Order the events in which cells acquired mitochondria, as proposed by the endosymbiotic theory. Not all events will be placed First event Aerobic proteobacteria are engulfed by an ancestral anaerobic cell. The aerobic proteobacteria are protected by the ancestral cell and provide energy to the ancestral cell through aerobic respiration. Evolution occurs over many generations, and the proteobacteria lose the ability to exist outside of the ancestral cell. The respiratory machinery of the proteobacteria is incorporated into the ancestral cell as a membrane-bound organelle. Last event Because prokaryotic cells cannot replicate, the ancestral cell degrades them and engulfs new ones Continued below..

Explanation / Answer

1) Aerobic proteobacteria are engulfed by ancestral anaerobic cell.

2) The aerobic proteobacteria are protected by the ancestral cell and provide energy to the ancestral cell through aerobic respiration.

3) Evolution occurs over many generations, and the proteobacteria lose the ability to exist outside of the ancestral cell.

4) The respiratory machinery of the proteobacteria is incorporated into the ancestral cell as a membrane-bound organelle.

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