Together, the total area of a cell's internal membranes far exceeds that of its plasma ... the cytoplasmic part of the cell may or may not have been incoporated into the new eukaryotic nucleus ...
They named the microbe Lokiarchaea after its home vent. Ettema suspected that a cell from this family ... Maybe the first eukaryotic ancestor did, too. That’s not the only hazy part of the process.