The presence of which organelle indicates that eukaryotic cells have evolved from prokaryotic cells?

A) Membrane-bound Nucleus

B) Plasma Membrane

C) Endoplasmic Reticulum

The presence of a membrane bound nucleus describes the evolution of eukaryotes from prokaryotic organisms. The endosymbiotic theory describes the same, the large cells engulfed the smaller ones, and the engulfed cells were not digested but started living in mutual cooperation with the engulfing cell. Mitochondria and chloroplast are thought to be the engulfed cells.