Final answer:
Plastids, which include chloroplasts, leucoplasts, and chromoplasts, evolved from a common ancestor called the pro-plastid, with evidence pointing towards an endosymbiotic origin with cyanobacteria.
Step-by-step explanation:
All three types of plastids have evolved from a common precursor termed the pro-plastid. Plastids, including chloroplasts, leucoplasts, and chromoplasts, are organelles found within the cells of plants and algae. They are believed to have originated from a symbiotic relationship with cyanobacteria, an event known as primary endosymbiosis.
Like mitochondria, plastids contain their own DNA and show similarities in structure and division mechanisms to cyanobacteria. This evolutionary lineage is further supported by the fact that the DNA in chloroplasts of algae is closely related to photosynthetic cyanobacteria, suggesting a direct descent from this endosymbiotic event.