4. Evolutionary biologists and geologists recognize the "big five" mass extinctions and are actively studying a potential sixth. Which of these describes that potential sixth mass extinction? a. The extinction that included the dinosaurs b. The great flood of Noah c. The current extinctions aused primarily by human activities d. The mass extinction that occurred in the Proterozoic, before animal life e. The end-Carboniferous mass extinction, which affected plants, not animals 5. Charles Mitter and colleagues found evidence that herbivory promotes high diversification rates by comparing the diversity of groups of herbivorous insects with the diversity of a. herbivorous mollusks. b. nonherbivorous sister groups. c. unrelated insect groups whose clades were the same age. d. the plants that the herbivorous insects used as a food source. e. the same insect groups in the fossil record