Such cells may have ten or 20 times more membrane within them than they have defining their surfaces. ... The world’s prokaryotic cells vastly outnumber their eukaryotic cousins.

Think back to that basic biology class you took in high school. You probably learned about organelles, those little “organs” inside cells that form compartments with individual functions. For example, ...

The researchers investigate a range of prokaryotic and eukaryotic cell types to determine a) how cell volume in prokaryotes can eventually act to constrain a cell's membrane surface area required ...

Membrane-bound organelles were the textbook standard of how scientists thought cells were organized until they realized in the mid-2000s that some organelles don't need to be wrapped in a membrane.