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: In the Corey-Bakshi-Shibata catalyst, an atom of it is attached to a pyrrole ring, an oxygen atom, and a toluene group. This element's acids are combined with amines and ketones in the Petasis reaction and in combining alkyl halides through the Suzuki coupling. Complexes containing it are called sido or arachno according to Wade's rules, and a more famous reaction using it is sometimes named for Herbert Brown. Mined from the ore Uletite, its silicate was once used in making hard glass for manufacturing laboratory equipment. For 10 points, name this element that participates in an anti-markonikov addition reaction to alkenes, with atomic number 5 and symbol B.

SOLUTION: Science

PROBLEM: Founder-flush models of this phenomenon propose that it may result from repeated bottlenecks. Changes of ploidy in plants can cause this process due to the frequent sterility of the resulting offspring. The(*) sympatric version of this phenomena occurs between populations in the same region, and punctuated equilibria are a sign of the allopatric variety of this process in the fossil record. For 10 points, name this biological process, in which populations become reproductively isolated and diverge, leading to the formation of new species.

SOLUTION: Social Science

PROBLEM: This countrys ruler Kaleb invaded southern Arabia and ruled there until 525, and a century later, Armah gave asylum to early Muslims. Kassa Halyu had himself crowned Emperor Theodore II in 1855, and was succeeded by Johannes, who was himself succeeded by the signer of the Treaty of Ucciali. Starting in 1527, this country was overrun by Muslims led by Harar, and many of this countrys Falashas were repatriated to their religious homeland of (*) Israel in 1991 as part of Operation Solomon. This country was ruled by the Zagwe dynasty for 300 years after the fall of the Kingdom of Aksum, and in medieval Europe, this country was associated with the Christian kingdom of Prester John. Other famous rulers include Lij Yasu, Menelik II, and Haile Selassie. FTP, name this eastern African nation, formerly known as Abyssinia, with capital at Addis Ababa.

SOLUTION:
History