The U.S. Environmental Protection Agency said Wednesday that the average fuel economy of 2015 model-year vehicles increased 0.5 mile per gallon to a record high of 24.8 miles per gallon. Mazda had the highest average fuel economy of 29.6 mpg, the EPA said. Fiat Chrysler had the lowest, at 20.8 mpg. Most manufacturers improved over 2014, but General Motors Co. and Toyota Motor Corp. both had lower fuel economy in 2015 because they produced more trucks. Weight loss is one reason that fuel economy is increasing.
Prokaryotes and eukaryotes both have a plasma membrane. Prokaryotes also have a cell wall. Some eukaryotes also have cell walls, including plant cells and fungi. Prokaryotes and eukaryotes both have a plasma membrane. Prokaryotes also have a cell wall. Some eukaryotes also have cell walls, including plant cells and fungi.
Prokaryotes known as  gram-negative bacteria , for example, often have two plasma membranes with a space between them known as the periplasm. As in all cells, the plasma membrane in prokaryotic cells is responsible for controlling what gets into and out of the cell.nfection is the kind of thing that you don't want prokaryotes doing to you. Keep in mind that the plasma membrane is universal to all cells, prokaryotic and eukaryotic. Because this cellular component is so important and so common, it is addressed in great detail in its own In Depth subsection.