The period of the zygote begins with

The period of the zygote begins with
 
  a. ovulation.
 b. ejaculation.
 c. implantation.
  d. fertilization.

Question 2

How many of the following are considered secondary sex characteristics: growth of facial hair in boys, development of a functional uterus in girls, voice change in boys, and broadening of shoulders in girls?
 
  a. one
 b. two
 c. three
  d. four

Question 3

Which activity indicates the most equitable division of labor between parents?
 
  a. Vacuuming the carpet
 b. Repairing the drain
 c. Responding to the doorbell
  d. Decorating the living room

Question 4

Whose behavior best exemplifies eugenics?
 
  a. Dr. Green, who uses an in vitro fertilization technique
 b. Dr. Black, who allows only certain individuals to mate
 c. Dr. White, who studies the effects of thalidomide on prenatal development
  d. Dr. Brown, who closely monitors the nutrition of expecting mothers

Question 5

During puberty, changes in physical maturity that are not directly linked to reproduction are referred to as ____ sex characteristics.
 
  a. primary
 b. secondary
 c. tertiary
 d. instrumental