Oceanic trenches are long, steep depressions on the ocean floor. How is an oceanic trench formed?
PLZ HELP ASAP :]

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.  

answer; /// the shaft of the hair consists of dead cells;