For boys, the usual sequence of physical changes in puberty is: ...

[cookcarl]

For boys, the usual sequence of physical changes in puberty is:
 
  growth of the testes; initial pubic-hair growth; growth of the penis;
  spermarche.
  growth of the testes; growth of the penis; initial pubic-hair growth;
  spermarche.
  spermarche; growth of the testes; growth of the penis; initial pubic-hair
  growth.
  initial pubic-hair growth; growth of the testes; spermarche; growth of the
  penis.

Question 2

The first outward sign of puberty in a typical girl is
 
  a spurt in height.
  the onset of nipple growth.
  an increase in weight.
  the development of muscular strength.

[Pariscourtney]

Answer to Question 1

growth of the testes; initial pubic-hair growth; growth of the penis;
spermarche.

Answer to Question 2

the onset of nipple growth.