Also referred to as a person‘s social class, his or her ____ includes their level of education, income, and occupational status

Which of the following is TRUE about unhealthy sperm?

A) Most damaged sperm do not survive the long journey to the egg. B) Nature rarely selects out unhealthy sperm. C) Sperm is unaffected by toxic substances. D) Cocaine destroys the mobility of sperm cells.

Sheila (a girl) and Brian (a boy) are fraternal twins and are 8 years old. If their development is typical, their parents should expect that they will experience the adolescent growth spurt in which of the following patterns?

a. Sheila and Brian will both experience the growth spurt at about the same time. b. Sheila will experience the growth spurt about 2 years before Brian does. c. Sheila will experience the growth spurt about 1 year after Brian does. d. Sheila will experience the growth spurt about 2 years after Brian does.