Animal studies show that
a. hormonal treatments during the prenatal period have no effect on male or female aggression levels.
b. androgens administered to female animals during the prenatal period subsequently increase aggression.
c. estrogen administered to male animals during the prenatal period subsequently increases aggression.
d. estrogen administered to female animals during the prenatal period subsequently increases aggression.
Question 2
Because the umbilical cord continues to pulse after birth, in many societies the umbilical cord is cut off
a. immediately after delivery c. just before leaving the hospital
b. several minutes after birth d. a week post delivery
A male and female fat-tailed gerbil (Pachyuromys duprasi)
Embryonic Period
Embryonic Period - 7th week
Male Pattern baldness
Digital illustration of a fish that was believed to have become extinct during the Cretaceous Period