The Endosymbiotic Theory Does NOT Provide an Explanation For

Question

The endosymbiotic theory does NOT provide an explanation for
A) the two membranes of the nuclear envelope.
B) the presence of ribosomes in mitochondria.
C) the presence of DNA in chloroplasts.
D) the cristae in mitochondria.
E) the double membrane of chloroplasts.

Accepted Answer

The endosymbiotic theory explains the origin of mitochondria and chloroplasts from free-living prokaryotes that were engulfed by ancestral eukaryotic cells. However, it does not provide an explanation for the two membranes of the nuclear envelope, which are thought to have originated from invaginations of the ancestral cell membrane.