During the past century and a half, the average age of menarche ...

[dollx]

During the past century and a half, the average age of menarche in the United States has plummeted. This is an example of:
 
  a. proximodistal growth. c. secular trend.
  b. cephalocaudal growth. d. the effects of excessive estrogen.

Question 2

According to Piaget's cognitive-developmental theory:
 
  a. children develop the skills that lead to object permanence by 3 months of age.
  b. children develop an understanding of object permanence all at once.
  c. children come to understand object permanence even without prior experience.
  d. children develop object permanence before they develop emotional bonds to specific caregivers.

[Kjones0604]

Answer to Question 1

C

Answer to Question 2

D

[dollx]

Thanks for the timely response, appreciate it

[Perkypinki]

Gracias!