1. Although she did not take any formal biology classes in school, her discovery _______ the notion that she was unfamiliar with the way living organisms behaved.   undermined   substantiated   underscored   disseminated   documented   Hint Hint       2. It is not mere fiction that a dolphin can carry on two conversations simultaneously, one by whistling and the other by making clicking sounds; in fact, the phenomenon is not even _______.   explicable   uncommon   substantiated   true   pragmatic   Hint       3. The imposition of heavy taxes on industries that emit toxic substances into the environment could prove to be an effective _______ to maintaining a clean, green earth.   deterrent   appellation   incentive   abeyance   apparition   Hint       4. Scientific experiments demonstrate that the ready availability of food and the lack of stimulation over a prolonged period of time can lead to even predators transforming into _______ creatures.   agrarian   placid   frantic   caustic   carnivorous   Hint       5. At the farewell function, the dignitary's address to the young graduates was _______, offering no new words of wisdom but common knowledge.   pragmatic   labyrinthine   ambivalent   platitudinous   opprobrious   Hint       6. It was _______ on the part of the senate that obstructed the adoption of a revolutionary teaching methodology in the executive MBA program.   effrontery   anachronism   magnanimity   propriety   conservatism   Hint       7. Although David was severely critical of his wife, he did not dare treat her with _______.   sarcasm   contempt   insularity   superciliousness   mendacity   Hint