Prokaryotes have only one lipid bilayer- the cell membrane (also known as the plasma membrane). Many prokaryotes also have a cell wall, but the cell wall is composed of proteins or long chain carbohydrates, not lipids.
3. countable noun. A wedge is an object with one pointed edge and one thick edge, which you put under a door to keep it firmly in position. 4. countable noun. A wedge is a piece of metal with a pointed edge which is used for splitting a material such as stone or wood, by being hammered into a crack in the material.
An A wedge is usually a type of gap wedge, and it tends to fall in between the pitching club and the sand wedge. That means it could fall anywhere between 45 and 55 degrees. I have to add that I don't really use terms like sand wedge, lob wedge, gap wedge, or approach wedge anymore. I custom built my wedge set.