Your coworker and good friend has just returned from a trip abroad (since he works for the cia, he can’t tell you where he has been). two days after his return, he falls deathly ill with a severe infection. your job as his friend is to find the best (and most efficient and quickest) way to identify what caused the illness? what molecular diagnostic approach will you use? once you have identified the cause, what treatment will you develop and why and how will you do it so your friend is quickly back to normal?

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.  

here is the answer

water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.