What two biomolecules make up condensed dna (aka chromosomes)?

What is the importantence of the carbon and nitretan cycles in the environment

Sea stars, sea urchins, sand dollars, and brittle stars are all memeber of a group, what is the common name of the group they are all in

Most crimes involve some evidence relating to the human body; for that reason, what related science is frequently used in forensic investigations? a)psychiatry b)physics c)botany d)biology