Choose all the answers that apply. mars: - may have once had liquid water - has polar ice caps - has a reddish color from iron - has no moons - is a terrestrial planet

*May have once had liquid water

*Has Polar ice caps

*Has a reddish color from iron

*Is a terrestrial planet

Explanation:

I had this question in OW and got it correct.

We also know these answers are correct because all of them have been verified by scientists and people who are studying Mars.

Hope I helped:)

Have a great day!!!

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.