In the Three-Domain Model, the Bacterial Ancestor of Chloroplasts Derives

Question

In the three-domain model, the bacterial ancestor of chloroplasts derives from ancient
A) fungi.
B) cyanobacteria.
C) proteobacteria.
D) archaea.
E) protists.

Accepted Answer

Chloroplasts are believed to have originated from ancient cyanobacteria through a process called endosymbiosis, where a cyanobacterium was engulfed by a larger cell and eventually became an integral part of that cell, leading to the development of plants and algae.