What is the main difference between the two hypotheses for the origin of the eukaryotic cell?

The main difference between the two hypotheses for the origin of the eukaryotic cell is whether the nucleus appear before or after the endosymbiotic event

Explanation:

There are two major hypothesis for the origin of eukaryotic cell (cell withe the membrane-bound organelles and nucleus):

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the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.