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.
Functions of Chloroplasts. Chloroplasts are membrane-bound plastids containing chlorophyll, thylakoids, grana, and their own set of DNA molecules dispersed in the stroma. Each component of a chloroplast has a unique role in photosynthesis and photorespiration.hloroplasts -- the kitchens of plant cells -- are the key organelles for the nourishment of plants and other autotrophs. They are also the sites for nitrogen fixation, the reactions of which are interconnected with the processes of photosynthesis and photorespiration, and play a protective role in plant cells.