Which of the known organisms do you find similar to semi-autonomous cell organelles? What can you suggest about their origin?

Mitochondria are semi-autonomous organoids, as depend on the functioning of the cell. They themselves cannot exist, but at the same time they are capable of independent division, they also synthesize their own proteins and enzymes.
It is believed that mitochondria arose when aerobic prokaryotic organisms entered the host cell, which led to the formation of a specific symbiotic complex. So, mitochondrial DNA has the same structure as the DNA of modern bacteria, and protein synthesis in both mitochondria and bacteria is inhibited by the same antibiotics.

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