Final answer:
The accepted mechanism for how Eukaryotic cells evolved from prokaryotic cells is the endosymbiotic theory. This theory explains that eukaryotes originated from one prokaryotic cell engulfing another and evolving together over time, resulting in the development of key components of eukaryotic cells.
Step-by-step explanation:
The accepted mechanism for how Eukaryotic cells evolved from prokaryotic cells is the endosymbiotic theory. According to this theory, eukaryotes are a result of one prokaryotic cell engulfing another, eventually evolving together over time. This process led to the development of key components of eukaryotic cells, such as the nucleus and organelles like mitochondria and chloroplasts. Mitochondria, for example, are believed to have originated from an ancestral cell engulfing an aerobic bacterium.
The endosymbiotic theory is widely accepted and supported by evidence from research on the origins of eukaryotic cells. It explains how eukaryotic cells evolved from prokaryotes and provides insight into the diverse structures and functions of modern eukaryotes.