The cenozoic era is best described as the era in whicha. a mass extinction event occurred. b. mammals began to dominate the landc. dinosaurs emergedd. multicellular life diversified.

Which of the following characterize the historical move toward urbanization? i. increase in pollution ii. increase in frequency of natural disasters iii. increase in incidence of infectious disease a. i b. ii c. i and ii d. i and iii e. i, ii and iii