Once an endosymbiotic relationship was established between a bacteria and a eukaryotic cell, what effect did it have on their genomes?

A) The bacteria transferred all of its DNA to the eukaryotic nucleus.
B) The endosymbiotic relationship did not affect either cell's genome.
C) The bacteria lost its genome and relied solely on the eukaryotic cell.
D) Both genomes evolved so that eventually the host and the bacteria became incapable of living independently.
E) The eukaryotic genome lost some genes whose function could be supported by the bacteria but the bacterial genome did not change.

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Zybrea Knight · Accepted Answer

Final Answer : D, Explanation :  The establishment of an endosymbiotic relationship led to the evolution of both genomes in such a way that the host eukaryotic cell and the bacteria became interdependent, each losing the ability to live independently. This is evident in the relationship between mitochondria/chloroplasts and their host cells.

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