Continental drift separating a once continuous population is an example of
A) Lamarckian evolution
B) punctuated equilibrium
C) mutation
D) vicariance
D
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A catalyst speeds up a chemical reaction as a result of which of the following?
A) It provides an alternate pathway with a lower activation energy. B) It increases the number of collisions between reacting molecules. C) It makes the reaction more endothermic. D) It makes the reaction more exothermic.
The reactants shown schematically below represent iron oxide, Fe2O3 , and carbon monoxide, CO. Which of the following is the correct full balanced chemical equation for what is depicted?
A. Fe2O3 + 3 CO ? 3 FeO2 + 2C B. Fe2O3 + 3 CO ? 2 Fe + 3 C2O C. Fe2O3 + 3 CO ? 2 Fe + 3 CO2 D. Fe2O3 + 3 CO ? 3 FeO + 2 C
During the latter half of the twentieth century, distinctive intraregional migration of African Americans was represented by
A) urban to rural. B) urban to urban. C) inner city to outer city and inner suburban neighborhoods. D) forced migration. E) rural to urban.
The term Pax Romana refers to
A) The Age of Augustus B) The mythical period of early Rome, before wars and expansion C) The period of the Empire from the Age of Augustus to the death of Emperor Marcus Aurelius D) The mythical period of peace, described in Vergil's Aeneid