"At some point, in a sequel to mitochondrial capture, a eukaryote engulfed a cyanobacterium capable of photosynthesis... green organelles called chloroplasts, evolved into plants and other photosynthesizers."
Chloroplasts are only one type of plastid; this process occurred far more than once.
Chloroplasts are only one type of plastid; this process occurred far more than once.
https://en.m.wikipedia.org/wiki/Plastid