Relative to the Jurassic age of dinosaurs, today's carbon dioxide concentration is about A.
5 times higher
B.
5 times lower
C.
50 times higher
D.
the same

they kick it to the curb.

explanation:

that current was nasty.

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.  

answeranovulation;