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.
Figure 9: The internal, soft tissue anatomy of a hermaphroditic scallop. The main function of the mantle is to secrete the shell but it also has other purposes. It has a sensory function and can initiate closure of the valves in response to unfavourable environmental conditions.It can control inflow of water into the body chamber and, in addition, it has a respiratory function.igure 9: The internal, soft tissue anatomy of a hermaphroditic scallop. The main function of the mantle is to secrete the shell but it also has other purposes. It has a sensory function and can initiate closure of the valves in response to unfavourable environmental conditions.