The following girls are all 14 years of age. Which of them most likely experienced menarche at the youngest age?
a. Corrinne's mother experienced menarche at the age of 13.
b. Candace lives in a stressful, unsupportive home environment.
c. Penny lives in a border town where street gangs threaten citizens on a daily basis.
d. Katie lives in a warm, protective home environment.
Question 2
Who is at greater risk of unintended pregnancy the first time they have sexual relations?
a. adolescents who receive comprehensive sex education
b. girls around the age of 16
c. adolescents who take a virginity pledge
d. adolescents from single parent homes
Abundant cave art after about 30,000 years ago is evidence of the importance of symbolic behavior fo
During the Pullman strike in Chicago, workers protesting wage cuts did $340,000 in property damage,
Shifts between Warm and Cold Periods during the Last 3 Million Years
School age (late childhood): 6–12 years, or to puberty.
How long does it take for 90% of a sample of strontium-90 (half-life of 28.8 years) to decay?
Beak size in finches during dry years increases because of strong selection