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.
The Plasma (Cytoplasmic) Membrane. Like the prokaryotic plasma membrane, the eukaryotic plasma membrane is a phospholipid bilayer containing proteins. Eukaryotic plasma membranes contain carbohydrates attached to the proteins and sterols not found in prokaryotic cells (except Mycoplasma bacteria).rganelles are specialized membrane-enclosed structures in the cytoplasm of eukaryotic cells. The nucleus, which contains DNA in the form of chromosomes, is the most characteristic eukaryotic organelle. The nuclear envelope is connected to a system of membranes in the; cytoplasm called the endoplasmic reticulum (ER).