Darwin argued that the large physical size of males was a ...

[crobinson2013]

Darwin argued that the large physical size of males was a physical specialization to aid in competition between males for females. He called this theory:
 
  a. sexual selection.
  b. natural selection.
  c. hybrid selection.
  d. reproductive selection.
  e. intra-species competitive selection.

Question 2

We have ample reason to suppose war has become a problem only in the past _____years, since the invention of food-production techniques and especially centralized states.
 
  a. 5,000
  b. 50,000
  c. 10,000
  d. 100,000
  e. 150

[AmberC1996]

Answer to Question 1

ANSWER: a

Answer to Question 2

ANSWER: c

[crobinson2013]

Thank you

[AmberC1996]

Happy to help you