Jonas Salk developed the first polio vaccine. When he accepted ...

[tiffannnnyyyyyy]

Jonas Salk developed the first polio vaccine. When he accepted the Nobel Prize, he said, The greatest reward for serving others is the opportunity to do further service.. Salk's statement suggests that his efforts were motivated by
 
  a. fame gained from research.
  b. the power to control production of a valuable substance.
  c. curiosity to answer scientific questions.
  d. altruism.

Question 2

Sexual maturation in boys results from
 
  a. observational learning of male sex roles.
  b. increases in the levels of testosterone.
  c. decreases in the levels of estrogen.
  d. increases in the levels of estrogen.

[Swizqar]

Answer to Question 1

D

Answer to Question 2

B

[tiffannnnyyyyyy]

Gracias!

[Viet Thy]

Excellent