Endosymbiosis has led to the creation of both mitochondria and plastids in eukaryotes. This has happened multiple times as can be seen in the varied structure of plastids.
Work Step by Step
Review Concept 28.1. Make a list of all mentions of endosymbiosis: you will see that they all involve mitochondria and plastids, organelles originating by this process as evidenced by, among other things, multiple concentric membranes as part of their structure.