Describe the structure of a plasma membrane and state the common characteristics of a plasma membrane.

Hi! 

The structure of a plasma membrane will consist of both proteins as well as lipids. This membrane is considered a boundary which will separate the living cell away from their non-living surroundings. 

Then the common characteristics of this membrane could be that it is made up of two layers of phospholipids and that it has a wide variety of proteins embedded in it. 

Hope I helped!
- Peaculiar 

Ibelieve the answer is relative humidity  because it makes more sense that way. solar flares usually occur in space it doesn't affect the earth, well it could but it wont make a significant damage.  latitude is land it doesnt do anything. prevailing winds, i dont know the correct meaning for this but i doubt that affects the land so it has to be relative humidity.

The category is the thing that is most simmilar throughout a period