« previous next »

Author Question: A deepening of the voice in boys usually occurs a. before the start of the growth spurt. b. at ... (Read 86 times)

danielfitts88

  • Hero Member
  • *****
  • Posts: 535
on: Jun 22, 2018
A deepening of the voice in boys usually occurs
 
  a. before the start of the growth spurt.
  b. at about the midpoint of the growth spurt.
  c. at age 19.
  d. at the same time in all boys.

Question 2

There is no secular trend for earlier puberty
 
  a. for boys in developed nations.
  b. in the last century (since 1900) for boys or girls in developed nations.
  c. in the last half century for boys or girls in developed nations.
  d. among girls in developing nations.


gstein359

  • Sr. Member
  • ****
  • Posts: 293
Reply #1 on: Jun 22, 2018
Answer to Question 1

Answer: b. at about the midpoint of the growth spurt.

Answer to Question 2

Answer: c. in the last half century for boys or girls in developed nations.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Did you know?

The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

Did you know?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Did you know?

Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

Did you know?

Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Effects of growth rate on development. Effects of growth rate on development.
growth of bacteria growth of bacteria
How many pounds of yeast must the manufacturer start with to obtain 550 lb at the end of 12 h? How many pounds of yeast must the manufacturer start with to obtain 550 lb at the end of 12 h?
Growth Forecast from The Limits To Growth Growth Forecast from The Limits To Growth
Growth Accounting for Europe, A.D. 500–1700 Growth Accounting for Europe, A.D. 500–1700
This table shows the growth of a crowd at a rally over a 3 h period. This table shows the growth of a crowd at a rally over a 3 h period.
Video: Spermatogenesis Animation

For a complete list of videos, visit our video library