1. A challenging new area in inorganic chemistry is _____ the role of transition metals in the biochemical catalysts called enzymes.

2. The United States government shares governmental powers with the states under the federal system. _____ by the United States Constitution.

3. When changes in the tilt of the Earth relative to the Sun shift the location of South America's warmest zone,_____ - with it

4. Lorraine Hansberry's play A Raisin in the Sun was _____ to be produced on Broadway.

5. _____ as taste is really a composite sense made up of both taste and smell.

6. n her time, Isadora Duncan was _____ today a liberated woman.

7. Wherever there is plenty of rain during the growing season, life is _____ in various forms.

8. _____ no conclusive evidence exists, many experts believe that the wheel was invented only once and then diffused to the rest of the world.

9. Total color blindness, _____, is the result of a defect in the retina.

10. _____ that Rachel Carson’s 1962 book Silent Spring was one of the chief sources of inspiration for the development of nontoxic pesticides.

11. Color and light, taken together, _____ the aesthetic impact of the interior of a building.

12. Like other women _____in the field of medicine, Sara Mayo found the beginning years difficult.

13. True hibernation takes place only among _____animals.

14. East Liverpool, Ohio, _____the pottery capital of the United States.

15. _____ principal types of acceleration: linear and angular.