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 organ produces a tetrapeptide, which bonds to macrophage receptors, and is known as tuftsin. The sinusoids of one portion of this organ contain blood and a reserve of monocytes which can be utilized in the case of hemorrhagic shock. The other major portion of this organ contains Malphigian corpsules and synthesizes antibodies. Located in the abdominal region and consisting of red and white pulp, for 10 points, name this organ part of the lymphatic system that helps to filter and clean the blood.

SOLUTION: Social Science

PROBLEM: composed a set of works dedicated to Grand Duke Paul of Russia that includes pieces such as "The Birds" and "How Do You Do" and one finale contains various pauses to confuse the audience, titled "The Joke. " One of his works contains the "Ewiger, machtiger Gott" chorus towards the end of its "Spring" movement. Another set of his works are occaisonally named for his collaborator Johann Salomon, including one whose second movement contains an 8-note accompaniment by the bassoons that imitates the ticking of the title device, and another which derives its name from the loud G chord in its sixteenth measure. For 10 points, identify this composer of the Clock and Surprise symphonies.

SOLUTION: Fine Arts

PROBLEM: This reaction is combined with an aldol condensation to produce cyclohexenones in a process named for Robinson, and a variation of this uses silyl ethers and titanium tetrachloride, in a reaction named also for Mukaiyama. In a process analogous to this reaction, performed with simple ketones, the equilbrium is shifted towards the reagents, unlike in the Claisen and aldol condensations, necessitating the use of an enolate in conjugate addition to produce the 1,4-addition. For 10 points, what is this reaction named for an American chemist, which consists of the addition of a carbanion to an alpha, beta unsaturated carbonyl

SOLUTION:
Science