If the amount of progesterone in the blood remained at the level seen in the beginning of the follicular phase for 6 straight months, what would the effect be on menstruation?

Menstruation will  disrupted.. This question forms the basis of application of progesterone pill in birth control. If the level is sustained from the follicular phase; together with oestrogen, progesterone suppresses  ovulation the  releases of oocyte(eggs).Therefore with ovulation suppressed, there will be no menstruation.

Furthermore,since it is  the non- implantation of  unfertilised egg, and the collapse of the prepared   uterine walls in anticipation of implantation that leads to menstruation, therefore if there was no egg available these sequences of events will not occur; no  shedding  of uterine wall  to  produce blood as menstruation.

Therefore a woman that takes progesterone pills to prevent pregnancy;only need to  take this pills at fixed time everyday to disrupts the follicular phase so that ovulation is suppressed. However it is advisable to take it another contraceptive pills, because of its 48hrs effective periods.

Explanation:

answer: the answer is b

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.