The two categories of sexual selection are _________________ and ___________________ .
a. Male-female competition; male mate choice.
b. Female-female competition; male mate choice.
c. Male-male competition; female mate choice.
d. Male-female competition; female mate choice.
Question 2
The two characteristics of language shared only among humans are:
a. Sematicity and Pragmatic Function.
b. Displacement and Productivity.
c. Interchangeability and Cultural Transmission.
d. Arbitrariness and Discreteness.