In Humans, freckles are dominant to not having freckles. A woman with freckles marries a man who does not have freckles, the woman’s father did not have freckles. What is the probability of having a child with freckles?
A: 0%
B: 25%
C:50%
D:100%

the answer is d. none of the above

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.