I hope this somewhat helps you
(Density dependent is the answer)
They contain genetic information and assist in making proteins
Before a cell divides DNA replicates itself. hope this helps!
The system of classification relates to the diversity of species because the system of classification is how we organize the diversity of species. With out it we would have a hard time trying to determine which animals belong with which group. There would be no order, just chaos of trying to determine animal likeness of one another.
To cut this answer short, it helps them organize organisms.