Question

which of the following did not provide evidence that chloroplasts arose from the engulfment of a cyanobacterium by a eukaryotic cell? presence of cyanobacterial pigments in red algae presence of peptidoglycan in glaucophytes nucleic acid sequencing electron microscopy presence of cyanobacterial photosynthetic pigments in green plants

Explanation:

Electron microscopy is a technique for visualizing structures, not evidence for the endosymbiotic origin of chloroplasts from cyanobacteria. Evidence includes similar pigments, nucleic - acid sequencing similarities, and the presence of peptidoglycan in some related organisms. Cyanobacterial pigments in red algae and cyanobacterial photosynthetic pigments in green plants suggest a relationship, and nucleic - acid sequencing can show genetic similarities. The presence of peptidoglycan in glaucophytes is also relevant as it is a feature of bacteria.

Answer:

Electron microscopy