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
A Golden Retriever at 12 years old
Measurements of solar cycle variation during the last 30 years
The basalt below the hominins is dated to 1.8 million years ago, and the geomagnetic polarity of the
When the number of miles traveled is considered, drivers under 25 years of age and those over 70 are ...
Earth 600 Million Years Ago