The occurrence of primary endosymbiosis in the evolutionary past is supported by the existence of
A) three membranes surrounding all chloroplasts.
B) three membranes surrounding all mitochondria.
C) peptidoglycan between the inner and outer membrane walls of chloroplasts.
D) two membranes surrounding the nucleus.
E) flagella consisting of microtubules.

Question

Quizplus · Accepted Answer

The presence of peptidoglycan between the inner and outer membranes of chloroplasts in some algae supports the theory of primary endosymbiosis, as it indicates a bacterial origin.

The Occurrence of Primary Endosymbiosis in the Evolutionary Past Is