The upper class makes up about 25 percent of the population in the united states. a. true b. false

Option b. The following statement is false: The upper class makes up about 25 percent of the population in the United States.

Explanation:

Lower, Middle and Upper classes are based on the income that the adults in a household receive. In 2015, the majority of the United States citizens were in the middle class, approximately 52 percent of the population. The lower class represented the 29 percent of the population, while the upper class represented the 19 percent of the population. In the case of the upper class, it is important to specify that within that 19 percent there are located the highest incomes in the country, that are far superior than the majority of the average upper class income.

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."

b.have there own function.