In developed countries, where children receive excellent ...

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In developed countries, where children receive excellent nutrition and medical care, the average age of menarche has been falling steadily in what scientists describe as a(n)
 
  A) HPG axis.
  B) set point.
  C) Tanner stage.
  D) secular trend.

Question 2

The triggers for the start of puberty are
 
  A) both genetic and environmental in nature.
  B) entirely genetic in nature.
  C) entirely environmental in nature.
  D) generally not well understood.

[Benayers]

Answer to Question 1

D

Answer to Question 2

A

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Thanks for the timely response, appreciate it

[bimper21]

Excellent