What evidence exists that the glaucophytes are one of the earliest groups to branch off from eukaryotes following the primary endosymbiosis of a cyanobacterium?
A) Remnants of the peptidoglycan-containing cell wall of the cyanobacterium can be found between membrane layers of the chloroplast.
B) Their chloroplasts contain the same pigments as those of early land plants and green algae.
C) There are three membranes that surround the chloroplast.
D) The glaucophyte chloroplast has retained some of the DNA and rRNA genes from its cyanobacterial ancestor.
E) A vestigial nucleus from the cyanobacterial ancestor is present in the chloroplast.

Question

Quizplus · Accepted Answer

D  The presence of remnants of the peptidoglycan-containing cell wall (A) and the retention of some DNA and rRNA genes (D) in glaucophyte chloroplasts are evidence of their early divergence following primary endosymbiosis with a cyanobacterium.

What Evidence Exists That the Glaucophytes Are One of the Earliest