How do monomers of dna differ from those of rna

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.