Consider the figure below.What does the arrow pointing from cyanobacteria to plants and algae indicate according to the endosymbiotic origin of eukaryotic cells?

Question

Quizplus · Accepted Answer

The arrow pointing from cyanobacteria to plants and algae indicates that cyanobacteria were internalized by early cells to form the chloroplasts present in plants and algae. This is in line with the endosymbiotic theory of the origin of eukaryotic cells, which suggests that mitochondria and chloroplasts were once free-living bacteria that were engulfed by a host cell and evolved into an organelle. In the case of chloroplasts, it is believed that they originated from cyanobacteria that were engulfed by a eukaryotic host cell.

Consider the Figure Below