The Evolution of Eukaryotic Cells Most Likely Involved

Question

The evolution of eukaryotic cells most likely involved
A)endosymbiosis of an aerobic bacterium in a larger host cell-the endosymbiont evolved into mitochondria.
B)anaerobic archaea taking up residence inside a larger bacterial host cell to escape toxic oxygen-the anaerobic bacterium evolved into chloroplasts.
C)an endosymbiotic fungal cell evolved into the nucleus.
D)acquisition of an endomembrane system, and subsequent evolution of mitochondria from a portion of the Golgi.
E)fusion of several prokaryotes to form one larger organism.

Accepted Answer

The endosymbiotic theory suggests that eukaryotic cells evolved through the process of endosymbiosis, in which an aerobic bacterium was engulfed by a larger host cell and evolved into mitochondria. This process allowed for the development of eukaryotic cells with efficient energy production, leading to the evolution of more complex organisms.