The evolution of eukaryotic cells most likely involved: endosymbiosis of an oxygen-using bacterium in a larger host cell−the endosymbiont evolved into mitochondria. evolution of an endomembrane system and subsequent evolution of mitochondria from a portion of the Golgi. endosymbiosis of an oxygen-using photosynthetic bacterium in a larger host cell−the endosymbiont evolved into mitochondria. endosymbiosis of an oxygen-using scavenger bacterium in a larger host cell−the endosymbiont evolved into lysosomes.

The evolution of eukaryotic cells in all probability included: endosymbiosis of an oxygen-utilizing bacterium in a bigger host cell−the endosymbiont developed into mitochondria. development of an endomembrane framework and consequent advancement of mitochondria from a segment of the Golgi. endosymbiosis of an oxygen-utilizing photosynthetic bacterium in a bigger host cell−the endosymbiont advanced into mitochondria. endosymbiosis of an oxygen-utilizing scrounger bacterium in a bigger host cell−the endosymbiont developed into lysosomes.

luisvaschetto luisvaschetto · Answer 2 · 2021-10-01T22:20:55+02:00

The endosymbiotic theory states that both mitochondria and chloroplast are eukaryotic organelles that were once free living aerobic prokaryotes (bacteria) which were ingested by anaerobic bacteria.

The endosymbiotic theory is supported by several lines of evidence:

Both mitochondria and chloroplasts have their own DNA and divide by binary fission.
Both mitochondria and chloroplasts have bacteria-like ribosomes (70S).
Both mitochondria and chloroplasts have a similar size to prokaryotic cells.

In conclusion, the evolution of eukaryotic cells most likely involved endosymbiosis of an oxygen-using bacterium in a larger host cell−the endosymbiont evolved into mitochondria.

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