All of the following are barriers to entry except which one?
A) patents
B) the presence of a natural monopoly in the market
C) a deadweight loss
D) control of an essential raw material
C) a deadweight loss
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A life spent totally on land was made possible by the evolution of:
A. lungs B. a waterproof skin C. the amniote egg D. all of these
What is one way in which descent group members support each other economically?
A) providing food for feasts or ceremonies B) determining who is a suitable marriage partner C) fighting together in warfare D) revering a shared ancestor
_________________was the opponent of Jean-Baptiste Lamarck and the proposer of the view that the earth's geological landscape is the result of violent cataclysmic events
a. Charles Lyell b. Alfred Russel Wallace c. Thomas Malthus d. Erasmus Darwin e. Georges Cuvier
Why can we not use the languages of nonliterate societies to learn about the origins of language?
A) Their languages are simpler and less developed than our own. B) Their written histories do not go far enough back in time. C) They were often developed more recently than written languages. D) The earliest languages left no traces that would allow us to reconstruct them.