1 Aden, Yemen is at 12 49'N, 45 1'E, 3 m (10 ft). 2  See map. 3  Aden has a subtropical desert / low-latitude arid hot climate (K ppen-Geiger classification: BWh). 4  The annual average temperature is 29.2 degrees Celsius (84.5 degrees Fahrenheit).
The core of a sphingolipid is an amino alcohol called sphingosine. Complex sphingolipids located in the plasma membrane of animal cells (especially nerve cells) have a structural function and are believed to protect the cell surface from harmful environmental factors.
Phospholipids are amphipathic molecules that make up the bilayer of the plasma membrane and keep the membrane fluid. Describe phospholipids and their role in cells. Phospholipids consist of a glycerol molecule, two fatty acids, and a phosphate group that is modified by an alcohol.