Explain how the data in the table can be used to evaluate possible evolutionary relationships.

because of

the answer is b.) hydrogen bonds between bases.

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.