Symbiosis is a relationship that is mutually beneficial to two organisms. Which organelle developed as a result of a symbiotic relationship?

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The mitochondrion developed from a symbiotic relationship between an ancestral eukaryotic cell and an aerobic prokaryotic cell (most likely a bacteria). This prokaryotic cell entered the eukaryotic cell and began providing energy through oxidative phosphorylation, which allowed the eukaryotic cell to develop a more efficient energy system. Over time, the prokaryotic cell became integrated into the eukaryotic cell as an organelle, the mitochondrion. The other organelles listed (golgi body, nucleus, and endoplasmic reticulum) did not develop from a similar symbiotic relationship.

Symbiosis Is a Relationship That Is Mutually Beneficial to Two