TASK DEFINITION: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
PROBLEM: This molecule facilitates the Griesbaum reaction and cleaves an alkene to forms an aldehyde or a ketone in a 1,3 dipolar cycloaddition, the Criegee mechanism. In the Chapman Cycle, this diamagnetic compound with a bent geometry is replenished by a paramagnetic, diatomic molecule. In that reaction, this molecule is formed by the absorption of a photon with a wavelength of less than 280 nanometers. It can be depleted by chlorofluorocarbons, making the Earth more susceptible to ultraviolet radiation. For 10 points, name this molecule found in a namesake atmospheric "layer", a triatomic allotrope of oxygen.

SOLUTION: Science

PROBLEM: This dynasty continued a system in which one month out of every five was given to military service by those who lived within 500 li of the capital; that was the Fubing system. A Buddhist savings bank stocked by donations was liquidated during this dynasty and was called the "Inexhaustible Treasury."  Governors known as "jiedushi" first sprang up during this period under emperor (*) Xuanzong. A major insurrection during this dynasty ended after Shi Chaoyi killed himself. This dynasty was  interrupted by the second Zhou dynasty when Ruizong announced that his mother, Wu Zetian, would be  emperor. For 10 points, name this Chinese dynasty that lasted from 618 until 907 and faced the An  Lushan rebellion.

SOLUTION: History

PROBLEM: In 1995 scientists at Ohio State discovered that they possess a property called "homing. "  Theories of how they arose are divided into the "late" and "early" camps and could not be resolved when they were discovered in the cyanobacterium Fischerella. They can occur in the middle of a domain, and sometimes even within a single codon. They are located by spliceosomes and those genes possessing them are termed "split. "  FTP, name these pieces of DNA that are excised as opposed to exons.

SOLUTION:
Science